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 0xdc8efe5a7450d9ccf4eae2e3a21e735ed884d7e3b599ddeb43627f06de5d280c. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/743d5a63-9ecf-441d-bcc1-fb8dceb6052a.json and https://artists.proofprofile.net/proofs/artist/743d5a63-9ecf-441d-bcc1-fb8dceb6052a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).