Corleone (; or ) is a town and comune of roughly 11,158 inhabitants in the Metropolitan City of Palermo, in Sicily, Southern Italy. The town is located in the central part of the Sicilian region,
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbf24f4198b84542b1d6f9826c84da6c030134ea7b8fd4c617a5588bb10a1a7. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55d29171-56df-4d00-ad8a-3275162e5a2e.json and https://artists.proofprofile.net/proofs/artist/55d29171-56df-4d00-ad8a-3275162e5a2e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).