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Can I verify someone else's proof?

Yes—verification is completely open and independent.

How to Verify

Anyone can verify a timestamp proof in three ways:

  1. On our platform: Visit ProofYouWereFirst.com/verify and upload the .ots file + original file. We'll check the proof on-chain.
  2. OpenTimestamps.org: Go to opentimestamps.org and verify the .ots file yourself using the official open-source tools.
  3. Manual verification: Developers can verify timestamps programmatically using the OpenTimestamps library.

Why This Matters

Unlike platform-based proofs (which rely on trusting the platform), Bitcoin timestamps are self-verifying. The proof exists on-chain, independent of ProofYouWereFirst.

Even if our platform disappeared tomorrow, your proof would still be valid and verifiable forever.

Other Questions

How does timestamping work?

We hash your file locally, anchor that hash on Bitcoin, and generate a verifiable certificate—no uploads, no data exposure.

Is my file private?

Yes. Your file never leaves your browser. Only the cryptographic fingerprint (hash) is sent for proof.

Is this legally recognized?

Bitcoin timestamps are accepted as admissible digital evidence in multiple jurisdictions. They prove a file existed at a specific time.

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