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 0x6878a8e2e1f2a6a0c6ffed59fafc697cf98a9338d1a886baaccc788eae6b24c3. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f252f6cb-1488-49f2-a142-c654bb061edd.json and https://artists.proofprofile.net/proofs/artist/f252f6cb-1488-49f2-a142-c654bb061edd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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The Christmas Song (Chestnuts Roasting On an Open Fire)
Canon of St. Nicholas (Or Jolly Old Canon in D)
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