1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de1c87a089457722aad064e53b180ecd07c3aa1c5909a1961210378f31b46d4. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd26c05b-f750-4d45-95d8-bcb91024dd07.json and https://artists.proofprofile.net/proofs/artist/cd26c05b-f750-4d45-95d8-bcb91024dd07.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Du temps des chevaux au temps des cerises
Anthologie De La Chanson Française - L'histoire En Chansons
Anthologie de la chanson française : chansons de soldats (Conscrits, soldats et séderteurs)
Chansons de Marins - Chants Traditionnels Bretons
Anthologie De La Chanson Française - Chansons Pour Enfants