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 0xf3d72a6b3dc535cf06bca1ece8ca52cef26c26c96a69b668b292be1064245b51. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6707c96d-88a0-4ff6-9811-6bc3e1de00fe.json and https://artists.proofprofile.net/proofs/artist/6707c96d-88a0-4ff6-9811-6bc3e1de00fe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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