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 0x4a66d284c319050b4b81077dd65e7eb45f771bcdb18122a02c3b415d2eb724e1. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cdfaf11f-0b38-4a0c-9187-d2504b19ae86.json and https://artists.proofprofile.net/proofs/artist/cdfaf11f-0b38-4a0c-9187-d2504b19ae86.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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