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 0x9e76291ddbf89adb14e8acb1d3b40446f0027dc6187c9507d58fa39caa2ce4d7. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/146e2cf0-b997-4f84-b60c-e601eb3bcad6.json and https://artists.proofprofile.net/proofs/artist/146e2cf0-b997-4f84-b60c-e601eb3bcad6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).