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 0xa868ab73a7a9ac9d0e0938983380ed358c249c82f55f4fd2a40e83a8bb8253ab. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/afe286ab-aab3-44bb-8122-67dc01b6e33d.json and https://artists.proofprofile.net/proofs/artist/afe286ab-aab3-44bb-8122-67dc01b6e33d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).