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 0x1123c3d09f3cf6f248e0b2532a8d50be3843422b4d117b3d9763fd03867a73b5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0b97320-bb79-435f-8235-bb6dc5b3bbaa.json and https://artists.proofprofile.net/proofs/artist/f0b97320-bb79-435f-8235-bb6dc5b3bbaa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).