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 0x43d90a98a5df2ca1a653c4c86e08fa11684d4add4bc00a11e3d9a9be760f4d2f. 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/e40bbd33-04c3-4226-b6c6-d6c9b33c4360.json and https://artists.proofprofile.net/proofs/artist/e40bbd33-04c3-4226-b6c6-d6c9b33c4360.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).