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 entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdd3b849eae2af8e61dcca13ba0ca36867df283cf42df464ce4fa4d0d30a6d9. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4e67c17-7df7-48d5-adbf-4b141e024a68.json and https://artists.proofprofile.net/proofs/artist/a4e67c17-7df7-48d5-adbf-4b141e024a68.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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OPAL004 BAT SIDE ONLY out of print/deleted
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