PROXAE
PROXAE

CERTIFY · FOREVER

Your idea, certified forever.

Timestamp a text, idea, or file. Prove you had it first.

⚠

To easily find your proof in the future, prefer a PDF file. A single different character invalidates the match.

Your content never leaves your browser — only its fingerprint is sent.

Private content
Only the fingerprint is transmitted
Bitcoin-anchored
Unfalsifiable
Permanent
Verifiable without Proxae

Interactive demo

Certify in 30 seconds

See how Proxae anchors your proof in the Bitcoin blockchain.

9:41
Proxae

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Hash

SHA-256

Fingerprint computed locally

Your file never leaves your device.

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Anchor

ID a7f3…c912
Status Pending
Hash e3b0c442…7852b855

proof-a7f3c912.ots

OpenTimestamps receipt

Bitcoin anchoring in progress…

Confirmed

Status Confirmed
Block #896,412
Date 2026-05-05 14:32 UTC
Tx 3a1b…f8e2 ↗

✓ Immutable proof

Anchored in the Bitcoin blockchain forever.

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No sign-up required — free and unlimited.

But isn't Bitcoin just a cryptocurrency?

Not only. At its core, Bitcoin is a tamper-proof global ledger shared by thousands of independent computers. Proxae writes the fingerprint of your document into it — no financial value, no transaction. It's the same technology, used for proof rather than exchange.

Proxae establishes prior existence with cryptographic strength at least equivalent to an official prior art deposit. It does not confer exclusive rights and does not replace a notarial act or legal advice.