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 0x5db6ecddcc6119341bf4c10ef82f172616e85ce6e6df0fc4585cd626465b3f3e. Chain 2 (Bitcoin): anchored in block 953795 (2026-06-15T13:44:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df9eed9c-6e92-49c7-82da-bc2ebbea9304.json and https://artists.proofprofile.net/proofs/artist/df9eed9c-6e92-49c7-82da-bc2ebbea9304.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).