Guido Ruggiero is a historian of the history of Italy from the fourteenth to seventeenth centuries. He is Professor of History and Cooper Fellow of the College of Arts and Sciences at the University
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 0x62f11d2b1cf57356392f944b65e7cf4892505ecf20d7a38c182e57636412a204. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9141ac9f-d249-449f-af95-8400421e5fb6.json and https://artists.proofprofile.net/proofs/artist/9141ac9f-d249-449f-af95-8400421e5fb6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).