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 0x30efbba00ed9bab5245e295565c0ed7c17cc600c9f2c28428e94576d3aa9869c. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/298ad8af-ea56-4e3a-ac51-fa76a8b13832.json and https://artists.proofprofile.net/proofs/artist/298ad8af-ea56-4e3a-ac51-fa76a8b13832.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).