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 0x319164b3c26c9a8a66efcdeb73119e56d16a55020222639b91a016bd7e5b3a77. 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/b601553c-9f99-4cc6-a7ee-de8124e33e8f.json and https://artists.proofprofile.net/proofs/artist/b601553c-9f99-4cc6-a7ee-de8124e33e8f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).