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 0x909bfa3a61a00da9f9fbea09ed2ccaeb31dfbd3433a00a3644d5f2e776a264e6. Chain 2 (Bitcoin): anchored in block 953667 (2026-06-14T17:49:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57fa69c6-8ec0-4215-b44c-ee7c1c371e04.json and https://artists.proofprofile.net/proofs/artist/57fa69c6-8ec0-4215-b44c-ee7c1c371e04.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).