Bari ( , ; ; ) is the capital city of the Metropolitan City of Bari and of the Apulia region, on the Adriatic Sea in southern Italy. It is one of the most important economic centres of mainland south
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 0xf7c6cff60a3f3d73642068b5c799c8e23230b421ef1037756779418e1e62b360. 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/857c2e0d-34d6-4e1c-9052-2eaf0d6f5456.json and https://artists.proofprofile.net/proofs/artist/857c2e0d-34d6-4e1c-9052-2eaf0d6f5456.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).