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 0x151dc12a165ee483cb49a8d87f1bf36aa260c6bc5583ed2f5a4426ecbd2e9c36. 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/78e6a5e8-8876-4935-afe1-a09966edbda8.json and https://artists.proofprofile.net/proofs/artist/78e6a5e8-8876-4935-afe1-a09966edbda8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).