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 0x7a9cb18c4fc3e11b52c3d03c371ff9c6592f07e811f1cf5451fe313b6eb9d7ab. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8ffbfb2-54aa-4c49-b502-9132d28bcef4.json and https://artists.proofprofile.net/proofs/artist/a8ffbfb2-54aa-4c49-b502-9132d28bcef4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).