Fabro is a comune (municipality) in the Province of Terni in the Italian region Umbria, located about 40 km southwest of Perugia and about 60 km northwest of Terni. History Fabro is first mentioned
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 0x0e318090cd06617386c3132ffd7656d21e82391f51d6c7776c6c8d2ffbded72c. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b93a5c1e-58df-4c52-9d67-f90f13bc7aff.json and https://artists.proofprofile.net/proofs/artist/b93a5c1e-58df-4c52-9d67-f90f13bc7aff.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).