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 0x358fbacd8454c0f1ec62582eba84f3a99ac7656d63141ab77d58017bc73d44c7. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54fb4c32-29bc-4a34-b71d-27f55ebdfd1c.json and https://artists.proofprofile.net/proofs/artist/54fb4c32-29bc-4a34-b71d-27f55ebdfd1c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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