1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 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 0x644597019acb0d31c53da5b73066816f448fc45ac207f10ef7d7c224b6e9b4af. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d11fec31-9f6b-4f0c-8a5b-3f2d08c5760c.json and https://artists.proofprofile.net/proofs/artist/d11fec31-9f6b-4f0c-8a5b-3f2d08c5760c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Jones: The Second Booke of Songs and Ayres
Segreti accenti: Italian Renaissance Music