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 0x0cc6b0e235c9967f8e724a48a652ecb66d2e6f573042d44644c0cadeda09b5e6. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1100de60-b1b9-45b9-b4e9-0dade2e2fed2.json and https://artists.proofprofile.net/proofs/artist/1100de60-b1b9-45b9-b4e9-0dade2e2fed2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).