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 0xbfd1ee51d8562e477e9e269f3edc9c0876e55f58e21d9f61d765d4f061b7fcbb. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ac9fd29-14cf-45f8-b8cc-8fc804186d58.json and https://artists.proofprofile.net/proofs/artist/7ac9fd29-14cf-45f8-b8cc-8fc804186d58.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).