Nettuno is a town and comune of the Metropolitan City of Rome in the Lazio region of central Italy, south of Rome. A resort city and agricultural center on the Tyrrhenian Sea, it has a population of
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 0x58c09779599ad971ce9717eeb90f006a24e87f55e62ddce1eb0cd6e06df1ade4. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/695b5d69-9361-43ce-acdf-2a00c0f4cf2f.json and https://artists.proofprofile.net/proofs/artist/695b5d69-9361-43ce-acdf-2a00c0f4cf2f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).