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 0x941a8f80b67d80b7343d1c8b26806a917bdba5517d9f1ff5113f3acfc4ab4f70. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80b1a7f6-346e-4107-aca1-74e1c1757f01.json and https://artists.proofprofile.net/proofs/artist/80b1a7f6-346e-4107-aca1-74e1c1757f01.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).