Prove when you created your work

It proves an exact file — and the description you entered — existed no later than the registration moment, and that your account registered it. It does not prove the work is original or that you are its author; it proves the bytes existed by that date.

No. The only date on the certificate is the moment of registration, set by an independent timestamp authority and the blockchain. There is no field to claim an earlier date — the tool can prove “no later than”, never “no earlier than”. That is exactly what makes it safe to rely on.

The file is hashed in your browser; the registry stores the 64-character SHA-256 fingerprint, the title and blocks you typed, and the timestamp proof — not the file’s contents.

They re-hash the file, look it up by fingerprint, and check the RFC 3161 token against the timestamp authority — independently, without trusting Timbrica. The specification page has step-by-step instructions.

An RFC 3161 timestamp is a recognised form of electronic evidence in many jurisdictions. This is an independent registry, not a government copyright office — it provides dated evidence, it does not replace any formal registration required where you are.

Yes. Registering a certificate, the verification pages, the PDF, the proof bundle and the JSON API are all free. You only need a Timbrica account to register.