Copyright Duration and Public Domain Toolkit

By Casey Scott McKay · 2023-09-13

Whether a work is in the public domain is arithmetic for works created after 1977 and archival research for everything earlier, and the difference between those two exercises is where clearance projects fail. This toolkit sets out the duration rules regime by regime, the formalities that governed pre-1978 works and the ways they were failed, and the renewal research that determines the answer for the mid-century material most clearance work concerns. It covers restoration under Section 104A and why a foreign work believed free may not be, the derivative works problem that Stewart v. Abend created, and the special categories - unpublished works, sound recordings, and government works. It closes with the trademark and publicity overlays and the determination memorandum that records the conclusion.

IP and Technology > Copyright | Toolkit | Published 13 September 2023 - Updated 18 March 2026 | Casey Scott McKay - marksy.us

Summary. Whether a work is in the public domain is arithmetic for works created after 1977 and archival research for everything earlier, and the difference between those two exercises is where clearance projects fail. This toolkit sets out the duration rules regime by regime, the formalities that governed pre-1978 works and the ways they were failed, and the renewal research that determines the answer for the mid-century material most clearance work concerns. It covers restoration under Section 104A and why a foreign work believed free may not be, the derivative works problem that Stewart v. Abend created, and the special categories — unpublished works, sound recordings, and government works. It closes with the trademark and publicity overlays and the determination memorandum that records the conclusion.

Keywords: copyright duration · life plus seventy · works made for hire term · pre-1978 works · renewal registration · notice formalities · publication definition · restoration under section 104A · Golan v Holder · Eldred v Ashcroft · Stewart v Abend · derivative works and renewal · pre-1972 sound recordings · government works · unpublished works · orphan works · trademark overlay on public domain · Dastar · clearance documentation · determination memoranda

Start Here

A publisher wants to reprint a novel first published in 1935. The author died in 1961. Is it free?

The arithmetic takes ten minutes and produces no answer, because for a work published in 1935 the term did not depend on the author's life. It depended on whether a copyright notice appeared on the published copies, and on whether someone filed a renewal registration in the twenty-eighth year — which is to say, in 1963, by a person the statute specified, in a form the Copyright Office recorded.

Finding out takes days. And the answer, when it comes, applies to the 1935 first edition and not necessarily to the 1968 revised edition the publisher happens to have on its shelf.

This toolkit answers three questions.

Which regime governs? Date of creation and publication determine which set of rules applies, and they are genuinely different.
What research is required? Notice examination and renewal searching for the pre-1978 material, and restoration analysis for foreign works.
What survives the public domain? Trademark, publicity, and contract, none of which expire with copyright.

If you read only one thing, read Is It in the Public Domain?. It works the regimes in order with the research steps each requires.

The Duration Regimes

Works created on or after 1 January 1978. 17 U.S.C. § 302 provides a term of the author's life plus seventy years. For joint works, the life of the last surviving author plus seventy. For works made for hire, anonymous works, and pseudonymous works, ninety-five years from first publication or one hundred and twenty years from creation, whichever expires first.

All terms run to the end of the calendar year. 17 U.S.C. § 305 provides that terms expire on 31 December of the year of expiration, which is why public domain days fall on 1 January.

Works created before 1978 but not published or registered before then. 17 U.S.C. § 303 brought them into the federal scheme with the 17 U.S.C. § 302 terms, subject to a floor that has now largely run.

Works published before 1978. Governed by the earlier scheme: an initial term from publication with notice, renewable for a second term. 17 U.S.C. § 304 extended subsisting copyrights, producing a total of ninety-five years from publication for works whose copyright was properly secured and renewed.

Which produces the operative rules. Works published before 1929 are in the public domain. Works published from 1929 through 1963 required renewal in the twenty-eighth year, and the substantial majority were not renewed. Works published from 1964 through 1977 were renewed automatically and run ninety-five years from publication. Works published from 1978 have the 17 U.S.C. § 302 terms.

The notice requirement. Works published before 1978 without a proper copyright notice generally entered the public domain immediately. 17 U.S.C. § 401 through 17 U.S.C. § 406 governed notice, with cure provisions for works published between 1978 and 1 March 1989 and no notice requirement thereafter.

Constitutionality. Eldred v. Ashcroft upheld the term extension against constitutional challenge, which settled the question of whether the current terms stand.

The rolling boundary. Each 1 January, another year of published works enters the public domain, which makes duration analysis a recurring exercise rather than a settled one.

Publication and Notice

The two facts that determine everything for pre-1978 works, and neither is obvious.

Publication under the earlier scheme meant distribution of copies to the public by sale or other transfer of ownership, or by rental, lease, or lending. Public performance and public display were not publication.

Which means a film shown in cinemas was not published, a play performed was not published, and a photograph exhibited was not published — points that decide cases about mid-century material.

Limited publication. Distribution to a definitely selected group for a limited purpose, without the right of further distribution, reproduction, or sale, was not publication and did not trigger the notice requirement or start the term.

Which cuts both ways. A work not published did not lose protection for want of notice, and it also did not start its term running.

Notice requirements. The symbol or the word, the year of first publication, and the name of the copyright owner, in a position giving reasonable notice.

Omission of notice before 1978 generally forfeited protection, subject to narrow exceptions for accidental omission from a small number of copies.

Defective notice. Wrong name, wrong year, or improper position could forfeit protection, with the analysis depending on the defect.

The cure window. For works published between 1 January 1978 and 1 March 1989, omission could be cured by registration within five years and a reasonable effort to add notice to distributed copies.

After 1 March 1989, notice became optional following adherence to the Berne Convention.

The practical research step. Examine a first-edition copy — not a later printing, not a reproduction, and not a database record. Notice examination requires the physical artefact, and locating one through an institutional collection is frequently the longest step in a clearance.

Renewal

Where the answer lies for most mid-century American material.

The requirement. For works published from 1929 through 1963, a renewal registration had to be filed in the twenty-eighth year after publication by a person entitled to claim renewal.

Who could renew. The author if living; otherwise the widow or widower and children; otherwise the author's executors; otherwise the next of kin. For works made for hire, composite works, and certain others, the proprietor.

The consequence of failure. The work entered the public domain at the end of the initial term. The estimate most commonly cited is that a substantial majority of works were not renewed, which is why so much mid-century material is free.

Automatic renewal. Works published from 1964 through 1977 were renewed automatically by later amendment, so no search is required for that period.

The search. Copyright Office renewal records for the relevant years, searched under the author's name in variant forms, the title, the publisher, and any corporate successors.

Which is the step that takes days. Renewal records for the earlier years are not fully searchable electronically, and a complete search may require the Office's own records or a commissioned search report.

Documenting a negative. A search that finds nothing must be recorded with the databases searched, the terms used, the years covered, and the date. That record is the conclusion; an undocumented negative is an assumption.

Stewart v. Abend creates the complication that matters most for derivative works: where an author died before the renewal term vested and the renewal passed to statutory successors, a licence granted in the initial term did not authorise continued exploitation of a derivative work in the renewal term. A film based on a story can therefore be blocked by the story's renewal claimant.

Which means renewal research is required for underlying works, not only for the work being used.

Restoration

The provision that makes a work believed free not free, and the one most often skipped.

The mechanism. 17 U.S.C. § 104A restored copyright in certain foreign works that had entered the public domain in the United States for specified reasons.

Which works. Works whose source country is an eligible country, that are not in the public domain in that source country through expiry of term, that have at least one author who was a national or domiciliary of an eligible country at creation, and that entered the US public domain because of failure to comply with formalities, lack of subject matter protection for sound recordings fixed before 1972, or absence of national eligibility.

Failure of formalities is the important limb. A foreign work published without a US copyright notice, or without renewal, entered the public domain — and restoration brought it back.

The date of restoration was generally 1 January 1996 for most eligible countries, with later dates for countries joining afterwards.

Term after restoration. The remainder of the term the work would have had in the United States had it never entered the public domain.

Reliance parties. Those who exploited the work while it was in the public domain received transitional protections, subject to notice requirements and, in some circumstances, payment of reasonable compensation.

Golan v. Holder upheld restoration against constitutional challenge, confirming that Congress may remove works from the public domain in this way.

Which is why source country matters. A work first published abroad requires a restoration analysis even where the US publication clearly failed a formality, and the analysis frequently reverses the initial conclusion.

What restoration does not reach. Works of US origin, works whose term has expired in the source country, and works that entered the public domain for reasons other than the specified ones.

The practical step. For any work with a foreign connection — foreign first publication, foreign author, foreign source country — run the restoration analysis explicitly and record the conclusion including the reasons for a negative. An unrecorded restoration analysis is the most common gap in an otherwise thorough clearance.

Special Categories

Unpublished works. Governed by 17 U.S.C. § 303, which brought common law copyright into the federal scheme. Unpublished works by authors who died more than seventy years ago are generally in the public domain, and unpublished anonymous works and works made for hire created more than one hundred and twenty years ago likewise.

Which makes archives easier than they appear. A collection of unpublished mid-nineteenth-century letters is generally free, and the constraint is the archive's supply terms rather than copyright.

Sound recordings. Recordings fixed before 15 February 1972 were outside federal copyright until 17 U.S.C. § 1401 brought them into a federal scheme with a schedule of expiry dates by fixation period, preempting state protections on a timetable. The analysis is separate from the analysis of the musical composition embodied in the recording, which has its own term.

Two copyrights, always. Composition and recording. A free composition may be embodied in a protected recording, and a free recording may embody a protected composition. See Two Copyrights, One Song.

United States Government works. 17 U.S.C. § 105 provides that copyright protection is not available for works prepared by a United States Government officer or employee as part of official duties — but the government may hold copyrights transferred to it, and works by contractors are not covered.

Which catches people. A government publication may contain contractor-created material, licensed images, and third-party content, none of which is free.

Foreign government works are generally protected, with the analysis depending on the source country.

Derivative works and compilations. 17 U.S.C. § 103 protects only the new material contributed. A modern edition of a public domain novel protects the editorial apparatus, not the underlying text — and a translation protects the translation, not the original.

Which produces the layered analysis that most clearance failures come from: the client holds a 1968 edition of a 1935 novel and believes the whole book is free.

Orphan works. Works whose owner cannot be identified or located are not in the public domain, and there is no general statutory solution. A documented diligent search reduces risk and does not eliminate it.

What Survives the Public Domain

Trademark. A title, a character name, or a distinctive visual element may function as a mark. Silverman v. CBS confirms that unabandoned marks constrain confusing uses of public domain material, subject to abandonment through non-use under 15 U.S.C. § 1127.

Which means a public domain character may not be usable on merchandise, particularly after Jack Daniel's Properties v. VIP Products narrowed the expressive-use threshold for source-identifying uses.

But not attribution. Dastar v. Twentieth Century Fox forecloses using 15 U.S.C. § 1125(a) to require credit for uncredited public domain material, which removes one route rights holders reach for.

Right of publicity. Where an identifiable living person appears — or, in states recognising post-mortem rights, a deceased one — commercial use may require a release regardless of the work's copyright status. This is state law and it varies substantially.

Contract and supply terms. An institution supplying a copy may impose terms restricting use, and those terms bind by contract independently of copyright. A client who obtained a scan from an archive under a licence has an obligation whatever the work's status.

Which is the distinction to explain early. The work is free; this copy came with strings.

Moral rights in jurisdictions that recognise them can constrain modification and require attribution beyond the copyright term.

Design and utility patents on features of a work's physical embodiment run on their own schedules.

Trade secret does not apply to published works but may to unpublished material obtained in confidence.

Defamation and privacy claims arising from the content are unaffected by copyright status.

Which produces the standard advice. Public domain status answers one question. Before use, run the trademark, publicity, and supply-terms overlays and record the conclusions on each.

The Layered Work Problem

The most common cause of a wrong determination, and it is a scoping failure rather than a legal one.

Identify the artefact, not the work. "The novel" is not an artefact. "The 1935 first edition, published in New York by X, as reproduced in the client's scan obtained from Y" is.

Because the layers differ. The 1935 text may be free. The 1968 revised edition's new material is not. The cover art is a separate work with a separate history. The translation is a separate work. The introduction by a later scholar is a separate work. The typography and design of a modern edition may attract protection in some jurisdictions.

Films are worse. The film, the underlying novel or play, the screenplay, the score, the songs, and any incorporated footage each have their own status — and under Stewart v. Abend the underlying work's renewal can constrain the film.

Sound recordings are two works at minimum, and frequently more where samples are involved.

Photographs of public domain works raise the question of whether a faithful reproduction attracts its own copyright, which has generally been answered against protection for slavish two-dimensional reproductions and is less settled for photographs of three-dimensional objects.

Restorations and reconstructions may contain protectable new material.

Compilations. 17 U.S.C. § 103 protects the selection and arrangement, not the underlying items, so an anthology of public domain stories protects the anthology.

The practical step. Before any research begins, write one line describing exactly what the client will use, at what edition, from what source. Half of failed determinations are cured by that sentence.

And check what the client actually holds. The determination applies to the artefact analysed, and the client frequently has a different one on the shelf.

Running a Determination

Step one — describe the artefact in one line. Edition, publication place and date, source of the copy the client holds.

Step two — list the layers. Text, illustrations, cover, introduction, translation, editorial apparatus, and any incorporated third-party material, each with its own analysis.

Step three — determine publication. For pre-1978 material, whether and when publication occurred in the statutory sense, remembering that performance and display were not publication.

Step four — place it on the timeline. Which regime governs, and what that regime requires.

Step five — examine notice where the regime requires it, on a first-edition copy located through a collection where necessary.

Step six — search renewal for works published from 1929 through 1963, under author, title, publisher, and successors, across the twenty-eighth-year window.

Step seven — document the negative with databases, terms, years, and date.

Step eight — run restoration under 17 U.S.C. § 104A for anything with a foreign connection, and record the conclusion including a negative one.

Step nine — check the underlying works where the artefact is derivative, because Stewart v. Abend makes their renewal status controlling.

Step ten — run the overlays. Trademark, publicity, and supply terms.

Step eleven — write the memorandum. Facts with sources, analysis, conclusion, assumptions, residual risk, and recommendation.

Step twelve — record the re-check trigger. New edition, new use, new territory, or a change in the client's source copy.

How long it takes. Ten minutes for a post-1978 work with a known author death date. Days for a mid-century work requiring notice examination and renewal searching. Weeks where the underlying works have their own chains.

Where to spend the effort. Proportionate to the use. A single archival image in a documentary is a different exercise from a national reprint programme, and the memorandum should say which standard was applied.

Common Mistakes

Analysing "the work" rather than the artefact. The client's copy is a specific edition with a specific history.

Applying the life-plus-seventy rule to a pre-1978 published work. The term did not depend on the author's life.

Assuming no renewal was filed. Most were not, and the determination requires a documented search rather than a statistical assumption.

Searching renewal in the wrong years. The window is the twenty-eighth year after publication, and searching the year of publication finds nothing.

Not documenting a negative search. An undocumented negative is an assumption wearing a conclusion's clothes.

Skipping restoration. A foreign work that failed a US formality may have been restored under 17 U.S.C. § 104A, and Golan v. Holder confirms that is constitutional.

Examining notice on a later printing rather than a first edition.

Treating performance as publication for pre-1978 works, which reverses the analysis entirely.

Ignoring the underlying work. Stewart v. Abend makes a story's renewal claimant able to constrain a film based on it.

Confusing the composition with the recording, which are always separate works.

Assuming government publications are entirely free, when 17 U.S.C. § 105 covers only works by officers and employees and government documents routinely incorporate contractor and third-party material.

Forgetting the overlays. Trademark, publicity, and supply terms survive copyright, and clients hear "public domain" as "unrestricted."

Not recording the determination. The memorandum is the deliverable, and its absence means the analysis has to be repeated the next time the question arises.

Three Worked Determinations

The 1935 novel. First published in New York, author died 1961. The regime is the pre-1978 scheme, so the term depended on notice and renewal rather than the author's life. A first-edition copy is located through a university collection and notice is present and proper. Renewal is searched across 1962 through 1964 under the author's name in three variant forms, the publisher, and two corporate successors; nothing is found, recorded with databases, terms, years, and date. The author was a US national and first publication was domestic, so 17 U.S.C. § 104A restoration does not apply — analysed and recorded rather than omitted. Conclusion: the 1935 text is in the public domain. Caveat: the 1968 revised edition, which the client happens to hold, is not.

The 1952 French film. First published in France. The US copyright failed for want of notice on the prints distributed domestically. The initial conclusion is public domain. The restoration analysis reverses it: France is an eligible source country, the film was not in the public domain there through term expiry, its authors were French nationals, and it entered the US public domain through failure of formalities. Restored on 1 January 1996, with the remaining term calculated as though it had never lapsed. Conclusion: protected. The reliance party provisions are examined for a client that had exploited it previously.

The 1948 photograph. Taken by a staff photographer for a newspaper. Publication occurred with the newspaper's notice covering the issue. Renewal search finds no renewal for the issue. Conclusion: the photograph is in the public domain. Overlays: the photograph depicts an identifiable person who died in 1974, and the intended use is a product advertisement — so the publicity analysis is run in the states where the product will be sold, and in two of them post-mortem rights persist and a release is required from the estate. The client's copy came from a picture library under a licence prohibiting advertising use, which binds by contract regardless. Conclusion: free of copyright, constrained by publicity and supply terms.

What the three have in common. In each, the copyright answer was not the operative answer. The layered edition, the restoration analysis, and the overlays did the work — and each is a step a fast determination skips.

Building the Practice

For organisations doing this repeatedly — publishers, archives, production companies, museums, and universities — the exercise should be a process rather than a project.

A determination register. One row per artefact, with the conclusion, the date, the researcher, the memorandum reference, and the re-check trigger. It prevents re-doing the same research and it answers diligence in an afternoon.

A standard memorandum format, so that determinations are comparable and complete.

A scoping standard. What level of research is applied at what level of use, decided in advance rather than negotiated per matter.

A relationships file with the institutions holding first editions, because locating physical copies is the slowest step and a standing relationship shortens it.

An annual January review. Each new year moves the published-works boundary, and works previously unavailable become available. A publisher that reviews annually finds material; one that does not misses it.

A rejected-conclusions file. Works examined and found protected, with the reasoning, so that the same question is not researched twice.

Training. The distinction between the work and the artefact, the layered analysis, and the overlays — taught to the editorial and production staff who make the first assessment.

And a standing caution. "Public domain" means free of copyright in the United States for the artefact analysed. It does not mean unrestricted, it does not mean free abroad, and it does not mean the client's copy came without obligations.

Questions Clients Ask

Is it free if it is old? Old is not a legal category. Published before 1929, yes. After that, it depends on notice, renewal, restoration, and the layers.

The author died fifty years ago. Isn't it free? Only if the work was created from 1978 onward, where 17 U.S.C. § 302 makes the term life plus seventy. For earlier published works the author's life is irrelevant.

It has no copyright notice. Is it free? For a work published before 1978, probably — subject to restoration under 17 U.S.C. § 104A if there is a foreign connection. For later works, notice was optional.

Can we rely on a database saying it is public domain? As a starting point. A determination requires the underlying records, and databases carry errors and gaps — particularly for renewal.

Most works were not renewed, right? The commonly cited estimate is that a substantial majority were not. That is a reason to search, not a substitute for searching.

We found it on a public archive website. Doesn't that mean it is free? No. It means someone posted it. The archive's own supply terms may also restrict what you do with their copy.

It is a US government publication. 17 U.S.C. § 105 removes protection for works by officers and employees in official duties. Contractor material, licensed images, and third-party content within it are not covered.

The recording is from 1965. Is it free? 17 U.S.C. § 1401 sets a schedule for pre-1972 recordings, and the composition has its own separate term.

We want to use a public domain character on merchandise. Check trademark. Silverman v. CBS and, for source-identifying uses, Jack Daniel's Properties v. VIP Products both bear on it.

We want to credit ourselves as the source. Dastar v. Twentieth Century Fox means the original creator has no Lanham Act attribution claim — which is a permission rather than a licence to mislead.

How certain can you be? For a post-1978 work with known facts, very. For a mid-century work, as certain as the search supports, which is why the memorandum records the assumptions and the residual risk rather than asserting a conclusion without them.

The One-Page Determination Format

Public domain determination — [artefact], [date]. Artefact. [Title], [edition], first published [place], [date]; client's copy sourced from [provenance]. Layers considered. [Text / illustrations / cover / introduction / translation / apparatus], each analysed. Regime. Published [date], engaging [regime], requiring [formalities]. Publication. Established by [evidence]; statutory publication [occurred / did not occur] on [date]. Notice. Examined on [copy identified, located at institution]; [present and proper / defective in that / absent]. Renewal. Searched [databases] under [terms] across [years] on [date]; [no renewal located / registration number]. Restoration. [Not applicable because [reasons] / analysed: source country [X], author nationality [Y], reason for public domain entry [Z], restored [date], remaining term to [date]]. Underlying works. [None / analysed separately per Stewart v. Abend, with conclusions]. Conclusion. The [year] [artefact] is [in the public domain in the United States / protected until (date)]. Overlays. Trademark: [searched, results]. Publicity: [identifiable persons, states assessed]. Supply terms: [source licence and restrictions]. Assumptions and residual risk. [Search completeness; unlocated foreign publication; layered material]. Recommendation. [Proceed with X only; do not use Y without a separate determination]. Re-check trigger. [New edition, new use, new territory, change of source copy].

The Termination Interaction

A related mechanism that produces a similar practical result and is frequently confused with expiry.

What it is. 17 U.S.C. § 203 permits authors and statutory successors to terminate post-1977 grants in a defined window, and 17 U.S.C. § 304 provides a parallel right for pre-1978 grants covering the extended terms.

Why it matters here. A work whose grant has been terminated is not in the public domain; it has returned to the author or their successors, who now control it. A user who assumed expiry and finds termination faces a rights holder rather than freedom.

The derivative works exception. A derivative work prepared under authority of the grant before termination may continue to be utilised, but no new derivative works may be prepared. Which means a film may continue to be exploited and a sequel may not.

Notice requirements are technical and the windows are narrow, which is why termination is both frequently missed by rights holders and frequently mishandled.

It is inalienable. No contract can waive it, which distinguishes it from every other transfer question.

Practical consequence for clearance. For any mid-century or later work being cleared through a licence chain, check whether a termination has been served or is within a window. A licence obtained from a party whose grant is about to terminate is a licence with a known end date.

See Transfers, Licenses, and Termination Rights.

A Closing Note

Two habits distinguish reliable public domain work from the kind that produces claims.

The first is describing the artefact rather than the work. Almost every failed determination traces to a scope error: the analysis was done on the 1935 first edition and the client used the 1968 revision, or on the composition and not the recording, or on the film and not the novel underneath it.

The second is documenting the negative. A renewal search that finds nothing is the conclusion in most mid-century clearances, and a search recorded with its databases, terms, years, and date is evidence. The same search unrecorded is a memory, and it will not be a memory in five years when the question is asked again by someone else.

Everything else — the regimes, the formalities, the restoration analysis, the overlays — is knowable from the statute and the records. Those two habits are what make the knowledge usable, and they are also what make the work repeatable, which for an organisation doing this at any volume is the difference between a capability and a series of one-off exercises.

Sector Notes

Publishing. Reprints, anthologies, and annotated editions, where the layered analysis dominates and the January boundary is a commercial calendar. A determination register pays for itself within a year.

Film and television. Underlying works, scores, songs, and stock footage each with separate chains, and Stewart v. Abend making the underlying work's renewal status controlling for derivative exploitation.

Documentary production. Archival footage and photographs, frequently obtained from institutions under supply terms that constrain use regardless of copyright status — the distinction producers find most counterintuitive.

Music. Composition and recording always separate, 17 U.S.C. § 1401 governing pre-1972 recordings, and sample clearance a distinct exercise. See Two Copyrights, One Song.

Museums and galleries. Reproductions of public domain works, where the question of whether a faithful photograph attracts its own copyright interacts with the institution's own supply terms and licensing model.

Libraries and archives. Unpublished collections, where 17 U.S.C. § 303 makes much older material free and where the practical constraint is the deed of gift rather than copyright.

Games and merchandising. Public domain characters and stories, with the trademark overlay doing most of the work and Jack Daniel's Properties v. VIP Products having tightened it.

Education and open content. Where the goal is to build on free material, and the risk tolerance is lower than the enthusiasm — a determination register and a house standard prevent a great deal of retrospective removal.

Anyone using foreign material. The restoration analysis under 17 U.S.C. § 104A is the step that most often reverses a conclusion, and it applies to material that looks unambiguously free.

What This Costs

A post-1978 work with known facts. Ten minutes, and no external cost.

A mid-century American work. Notice examination requires locating a first edition, frequently through an institutional collection, which takes days. Renewal searching takes hours to days depending on the period and whether a commissioned search is required. Budget accordingly and tell the client at the outset.

A foreign work. The restoration analysis adds source country research and, for close cases, foreign counsel.

A derivative work with underlying rights. Multiply by the number of layers. A film with a novel, a screenplay, a score, and licensed songs is five determinations.

The memorandum. An hour, and it is the deliverable.

The register. Setup is a day; maintenance is minutes per determination and it is what makes the practice scale.

Against that: a claim on a work assumed free. Statutory damages under 17 U.S.C. § 504 where the work was registered timely, fees under 17 U.S.C. § 505, and — for a publisher or producer — a recall.

And the opposite cost. Over-caution. An organisation that treats everything as protected licenses material it did not need to license and passes on projects it could have done. A documented determination process is what permits confident use of genuinely free material, which is the point of the exercise rather than an incidental benefit.

A Suggested Reading Path

For the analysis:

For the character and franchise dimension:

For the ownership and termination context:

Primary Authorities

| Authority | Proposition | |---|---| | 17 U.S.C. § 302 | Duration for works created from 1978 | | 17 U.S.C. § 303 | Works created but not published before 1978 | | 17 U.S.C. § 304 | Subsisting copyrights; renewal; termination | | 17 U.S.C. § 305 | Terminal date of terms | | 17 U.S.C. § 104A | Restoration of foreign works | | 17 U.S.C. § 401 | Notice on visually perceptible copies | | 17 U.S.C. § 405 | Omission of notice | | 17 U.S.C. § 406 | Error in name or date | | 17 U.S.C. § 105 | United States Government works | | 17 U.S.C. § 101 | Definitions; publication; work made for hire | | 17 U.S.C. § 103 | Derivative works; scope | | 17 U.S.C. § 203 | Termination of post-1977 grants | | 17 U.S.C. § 408 | Registration | | 17 U.S.C. § 1401 | Pre-1972 sound recordings | | Eldred v. Ashcroft | Term extension upheld | | Golan v. Holder | Restoration upheld | | Stewart v. Abend | Renewal term and derivative works | | Klinger v. Conan Doyle Estate | Incremental expression | | Warner Brothers Entertainment v. X One X Productions | Public domain materials and protected works | | Silverman v. CBS | Trademark constraints on public domain characters | | Dastar v. Twentieth Century Fox | No attribution right for public domain works | | Fourth Estate Public Benefit Corp. v. Wall-Street.com | Registration precondition to suit |

Forms and Templates

Public domain work produces one document that matters, and it is the determination memorandum: the artefact identified precisely, the facts established with their sources, the analysis by regime, the conclusion, the assumptions relied on, and the residual risk. Written at the time and signed, it is what a client relies on and what answers a later claim; written retrospectively, it is a reconstruction. The Portfolio Inventory Template serves as the determination register for organisations doing this repeatedly — one row per artefact, with the publication date, the regime applied, the notice finding, the renewal search result and date, the restoration analysis, the conclusion, and the re-check trigger. Publishers, archives, and production companies that maintain one stop re-doing the same research. The License Agreement Template matters for the frequent case in which a work is free but the copy the client holds came from an institution under supply terms that bind independently of copyright status — a distinction clients find counterintuitive and that decides real disputes.

Related Toolkits and Checklists

The Copyright Fundamentals Toolkit covers ownership, registration, and scope, which the duration analysis sits inside. The Public Domain Clearance Checklist runs the research steps in order and is the operational companion to this toolkit. The Copyright Enforcement Toolkit covers the position where a determination proves wrong and a claim arrives. And the Music, Film, and Creative Industry IP Toolkit covers the sector where derivative layers and underlying works make duration analysis hardest.