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 0xea8a58b876451aa14fd14853f46c562a22465133dcfd89464fb8467c842a850f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7bc7ce1f-ac37-4c93-8aa3-ec730eb8a34f.json and https://artists.proofprofile.net/proofs/artist/7bc7ce1f-ac37-4c93-8aa3-ec730eb8a34f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).