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 0x90ea0dfb6a6ee7e37cbea043fb3778a965b3ae2ed08835fe8cc8659be8eb5d98. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f04b8002-89e0-465a-b380-767e63b17141.json and https://artists.proofprofile.net/proofs/artist/f04b8002-89e0-465a-b380-767e63b17141.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Festival International Nuits d'Afrique 37ème Édition - Compilation 2023