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 0x8309be18c62ef1c574202991091a3f9c8f219bf5d3e3b7d49d39dc263dea92d7. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f98d81f9-4c97-4fb3-90e8-e9a47761dcbd.json and https://artists.proofprofile.net/proofs/artist/f98d81f9-4c97-4fb3-90e8-e9a47761dcbd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).