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 0x87247e5e4b84317ca120c1fc1fc14d03a1712af1a3a43d51688e9b5f2cfdfc88. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e31dd65-ebd8-4e48-bc26-ad753d13c289.json and https://artists.proofprofile.net/proofs/artist/8e31dd65-ebd8-4e48-bc26-ad753d13c289.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).