New registration

Register a fingerprint

Each registration uses 1 credit. Only the SHA-256 fingerprint is sent, unless you choose to store a copy. The record is chained into the public ledger and timestamped by FreeTSA.

Drop a file, or click to choose

Hashed locally with WebCrypto. The file does not leave your device.

Also store a copy Premium

Uploads the file to private storage (max 25 MB). The server re-hashes it and rejects mismatches. You get a one-time retrieval code.

Optional details

Identity details are your own claim. This registry does not verify them.

Your credit key · each registration uses 1 credit.

Fingerprint Registry

SHA-256 identifies content. An RFC 3161 token and a hash-chained ledger anchor it in time. Neither proves authorship or truth.

Timestamp authority: freetsa.org · RFC 3161 · SHA-256

Verifiable offline with OpenSSL

Created by Yannick Langlois

© 2026 Yannick Langlois. All rights reserved.