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 0x38cf243de73493fa9f1ff7f45eba05c5870d41f4f09b851dd891b1ad5b66ba67. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5089e51e-6f45-4a2b-b325-f0b2afb53d54.json and https://artists.proofprofile.net/proofs/artist/5089e51e-6f45-4a2b-b325-f0b2afb53d54.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Agustin Barrios Mangoré: Leyenda (Guitar Works Of The Southern Lands)