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 0x7f2b760cc920e4d84f1a1cc7d4d273cf9c312a20ea9337527bb823bce9d2665c. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13144d3e-0377-40f4-b2fb-caa1c34b75d6.json and https://artists.proofprofile.net/proofs/artist/13144d3e-0377-40f4-b2fb-caa1c34b75d6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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