MP3 · WAV · MP4 · JPG · PNG · PDF · PSD — the fingerprint is computed locally, nothing leaves
SHA-256 fingerprint
—
✓ SEALED — Ed25519 signature generated in your browser
Your proof link, verifiable by anyone:
✓ sealed
What you get
fingerprint 14b674…39aa
sealed on 2026-10-20T14:30:00Z
signed Ed25519 · anchored Hedera
✓ verifiable by anyone, no account, not by us
How it works
1 · Drop
Your file (music, image, video, code, text, design…). The SHA-256 fingerprint is computed on your side — the file never leaves your machine.
2 · We seal
Fingerprint timestamped + anchored on a public ledger (Hedera), continuously. Add your signature (private key / chip).
3 · You keep the proof
A receipt verifiable by anyone, no account, without us. That's your prior-art record.
4 · You defend yourself
Each seal generates a one-click proof link: the platform, a client or a judge opens it and sees the verified signature. No file, no lawyer.
What we prove
WHAT
Existence + integrity
The content existed at that date and hasn't moved since sealing.
WHEN
Timestamp
RFC 3161 timestamping via TSA (qualified eIDAS option). The time that counts is the ledger's.
WHO
Origin
Ed25519 signature in self-custody (or secure chip): cryptographic proof of the author, no intermediary.
WITHOUT
Nothing stored
Zero data with us. Only the fingerprint leaves. Your work stays yours, and only yours.
The infringement link
« A fake of your work is circulating online? Paste the URL of the suspicious content. We generate a single link that bundles your prior art, the comparison and your signature. You send it to the platform. 30 seconds, no lawyer. »
Identical copy → the hash matches, the proof is direct. Modified copy (cropped, re-encoded, deepfake) → your origin signature proves what you really sealed.