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 0xa2da6a57c976b53d575e8ac51b9d555be6d28d0cf9c5dcda6944546b7d0ecfab. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8374a8a-e56f-466b-912b-96c6d9b89d9b.json and https://artists.proofprofile.net/proofs/artist/f8374a8a-e56f-466b-912b-96c6d9b89d9b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).