doc.id logodoc.id
V3

Prove your file
in 30 seconds.

Immutable, timestamped proofs anchored to Bitcoin and sealed in a human-readable certificate. Invite co-signers, publish to archives, and verify publicly — all on doc.id.

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Why your proof lasts

Proof of existence

SHA-256 fingerprint + signed receipt.

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OpenTimestamps

Bitcoin anchoring.

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Content or existence.

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doc.id exists so the world remembers,

Files fade. Links rot. Proof should not.

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Files fade. Links rot. Proof should not.

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doc.id — Proof of Existence (immutable, timestamped, human-readable)