Les Yeux sans visage may refer to: Les Yeux sans visage, a 1960 French film also known as Eyes Without a Face "Les Yeux Sans Visage", a 1996 Combustible Edison song "Eyes Without a Face (song)", a 198
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a2c3245d2a8ca1fff1aa1f29286a50dc8a6562dd05638a0293d4f75db94f68. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8082f3c-2e66-4946-a3db-de2a8af5d327.json and https://artists.proofprofile.net/proofs/artist/f8082f3c-2e66-4946-a3db-de2a8af5d327.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).