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 0xad18892b083ee0c8ab0b38daf2409ebe5a5ab91e90ba8285fe34e0c4cab22eb6. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f1e94ac-9967-4e0f-9ead-853be5430b4b.json and https://artists.proofprofile.net/proofs/artist/6f1e94ac-9967-4e0f-9ead-853be5430b4b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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