BLOCKSTAMP

What this means for you

Approved and waiting on proof of use. It will register unless the applicant drops it, and its 05 Nov 2025 filing date already counts against anyone who files later.

Record

Serial number

99481694

Mark type

Stylized text

Filed

05 Nov 2025

Published for opposition

14 Apr 2026

Attorney of record

Russell R. Rotondi

Goods and services

• Class 009 — Scientific and electric apparatus: downloadable computer software for cryptographic hashing, timestamping, and verification of electronic files using blockchain technology; downloadable application programming interface (API) software and software development kits (SDKs) for integrating blockchain-based timestamping and verification into third-party software; downloadable computer software for generating, storing, and sharing verification links for electronic documents; downloadable computer software for accessing blockchain explorers to view timestamp proofs; downloadable computer software for synchronizing or replicating cloud storage buckets to a document timestamping service
• Class 042 — Scientific and technological services: software as a service (SaaS) featuring software for cryptographic hashing, timestamping, and verification of electronic documents using blockchain technology; platform as a service (PaaS) featuring computer software platforms for integrating document timestamping and verification with enterprise document management systems and cloud-based platforms; providing temporary use of non-downloadable software for verifying the integrity and authenticity of digital files and for generating and sharing verification proofs; cloud computing featuring software for anchoring document hashes to a blockchain and for accessing blockchain transaction data related to timestamp proofs; application service provider (ASP) services featuring application programming interfaces (APIs) for connecting document repositories, email systems, and cloud storage to a timestamping and verification service; technical support services, namely, troubleshooting of computer software problems relating to blockchain-based timestamping and verification; computer consulting in the field of blockchain technology, data integrity, and compliance as it relates to electronic document workflows
• Class 045 — Legal and security services: electronic document authentication services using blockchain technology; user authentication services using blockchain technology for verifying the integrity and authenticity of electronic documents

Owner

• SIMPLE PROOF INC., Roswell, GA, US

Prosecution history

• 19 Mar 2026 — APPROVED FOR PUB - PRINCIPAL REGISTER
• 18 Mar 2026 — ASSIGNED TO EXAMINER
• 07 Nov 2025 — NEW APPLICATION OFFICE SUPPLIED DATA ENTERED
• 05 Nov 2025 — APPLICATION FILING RECEIPT MAILED
• 05 Nov 2025 — NEW APPLICATION ENTERED