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 0x8b8881b9f8378f50d4221e854d70fd9eeef13ca74518a0b03c164de5fd8c20bb. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb52bd30-63ac-47c0-bb4d-8ebeb2c9a19f.json and https://artists.proofprofile.net/proofs/artist/cb52bd30-63ac-47c0-bb4d-8ebeb2c9a19f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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