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 0x8840b33e7199bc6d26ad510aca6bbb39e77117406ea814fddf5da86c7a20e111. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/909aff09-3a9b-4cd0-8246-0c5fa1c16d68.json and https://artists.proofprofile.net/proofs/artist/909aff09-3a9b-4cd0-8246-0c5fa1c16d68.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).