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 0x0c6c61046a27adf18ec8898746a88e01fd37deb0cdfa4eddc32a1d7dd5df1c09. 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/9090e62c-fa10-4f94-a03b-2dab7316134b.json and https://artists.proofprofile.net/proofs/artist/9090e62c-fa10-4f94-a03b-2dab7316134b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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