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 0x391476985447476313e3bb4ba4f6c01cc5d3fa760c7888e2ad349c4bbce8acc3. 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/d55fd2c5-d7c2-4362-919a-0ba6b553ec19.json and https://artists.proofprofile.net/proofs/artist/d55fd2c5-d7c2-4362-919a-0ba6b553ec19.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).