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 0x56d5a1ff58e5d3ae3e74fb5321bd20e08d8bcdf6f4a4d0967fdc98b52d20fa28. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/116b314c-ed1d-47ce-bec6-ac30f93aa632.json and https://artists.proofprofile.net/proofs/artist/116b314c-ed1d-47ce-bec6-ac30f93aa632.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).