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 0x0952f40d39af3b5c6186250b3a1a2e941f2f548ce991a3dc01158bc45aef1dd1. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e66fb89b-0aea-47f6-a4bb-4f2e3bfdd908.json and https://artists.proofprofile.net/proofs/artist/e66fb89b-0aea-47f6-a4bb-4f2e3bfdd908.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).