International Validity of Timestamps: eIDAS, Blockchain, and Global Legal Frameworks

Digital documents, source code, intellectual property, and electronic records are rapidly replacing physical paper. However, proving that a digital file existed at a specific point in time and has remained unaltered since cannot rely on system creation dates, which are easily tampered with.

What Does a Timestamp Legally Prove?

A cryptographic timestamp independently proves that specific digital data existed at an exact moment and that its cryptographic hash (SHA-256) has not been modified since.

Important Note: A timestamp does not validate the truthfulness of file contents or ownership itself. It proves beyond doubt that the exact digital data existed at that time and was not altered.

International Legal and Technical Frameworks

Electronic timestamps are backed by rigorous global regulations and technical standards:

eIDAS Regulation (EU) No 910/2014 ↗

As a directly applicable EU regulation, eIDAS establishes clear legal status for trust services:

Article 3(33): Defines an electronic timestamp as data binding other electronic data to a specific time, proving it existed unchanged.
Article 41: Ensures an electronic timestamp cannot be denied legal effect or admissibility as evidence in court solely because it is electronic.
Article 42: Establishes a legal presumption of accuracy for Qualified Electronic Time Stamps (QTS) across all EU member states.

ETSI, RFC 3161, and ISO Standards

ETSI EN 319 421 & 422: Defines policy, security requirements, and protocol profiles for Time Stamping Authorities (TSA).
RFC 3161 (TSP): The internet standard protocol defining client-TSA communication and cryptographic response validation.
ISO/IEC Standards: ISO 18014 (Time-stamping), ISO 27001 (Information Security), and ISO 27037 (Digital Evidence Preservation).

How Blockchain Strengthens Timestamping

Blockchain and timestamps are distinct technologies that form an unbeatable team. While a timestamp proves existence in time, blockchain guarantees that the record cannot be tampered with on a decentralized ledger.

Is Your File Uploaded to Blockchain? No! Only the SHA-256 cryptographic hash is anchored on-chain. Your file content remains 100% private and confidential.

The Homostamp Approach

Homostamp employs a privacy-first verification model. Your files are never uploaded or shared. By combining local SHA-256 hash generation, RFC 3161 standards, and blockchain anchoring, Homostamp delivers global verifiability without compromising privacy.