Roque Ceruti (Milan c. 1683 or 1686 – Lima, 1760) was an Italian composer in Peru. He was recruited as conductor of the Viceroy of Peru's private orchestra,Willi Apel Harvard dictionary of music 1969
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 0xbf3e9c1a58638672f0ebe809abcf638269b83cf09a0c991ffb872e14d21168bd. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c0e4cf4-5f71-432d-a04f-58778791ffe4.json and https://artists.proofprofile.net/proofs/artist/5c0e4cf4-5f71-432d-a04f-58778791ffe4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).