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 0x5a4d7e051395325bdfadc814a79cc4c81fa7a242d4b139117705708f8a55ec2e. Chain 2 (Bitcoin): anchored in block 953972 (2026-06-16T16:31:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a29c2f7-e9a5-4f61-b10c-6fb7c7630c07.json and https://artists.proofprofile.net/proofs/artist/2a29c2f7-e9a5-4f61-b10c-6fb7c7630c07.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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