X-39 Notaría

Agreements sealed on Bitcoin.

X-39 seals documents and agreements so anyone can verify their exact content and date, without trusting a middleman. Each one is anchored in Bitcoin (via OpenTimestamps) and co-signed with a post-quantum ML-DSA-87 signature (NIST FIPS-204). Free, reproducible and verifiable by anyone.

This site is an interactive verifier — please enable JavaScript to use it.