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 0x69f37d33fc0ac82e52163e076a3ca504d0b1f1d0991d1b1468ab802b57a5670e. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dbbb2c67-a06f-4c0a-a585-4f3f8e9ed1fc.json and https://artists.proofprofile.net/proofs/artist/dbbb2c67-a06f-4c0a-a585-4f3f8e9ed1fc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).