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 0x559212e923c7fb82163818c24e812b420b20fc94cf24d965733b9a984f9d186f. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2583a9ad-19d4-4b91-96b8-4d1e6b0da9cf.json and https://artists.proofprofile.net/proofs/artist/2583a9ad-19d4-4b91-96b8-4d1e6b0da9cf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).