thumb|the town Mareo ( ; ) is a comune (municipality) in South Tyrol in northern Italy, located about northeast of Bolzano. Geography As of 30 November 2010, it had a population of 2,911 and an are
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 0xc9a9102e367348f0ef6054fc5d19223e5b11b9eafd2522011e11b889d234ff28. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a424f73-cd7f-46f6-8429-dfe533e30b6b.json and https://artists.proofprofile.net/proofs/artist/8a424f73-cd7f-46f6-8429-dfe533e30b6b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).