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 0x9432045e9e10c22750e14c8d9dfa60eb0ba1cc401b4d66760ac8b9a06af3806d. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c0f0f02-167d-42cc-9ddc-ea80bd4e592d.json and https://artists.proofprofile.net/proofs/artist/8c0f0f02-167d-42cc-9ddc-ea80bd4e592d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).