Ocre is a comune (municipality) and town in the province of L'Aquila in the Abruzzo region of southern Italy. Description and history Its approximate 1,000 inhabitants reside in several small village
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 0x3e1cf977f415b89310ccb51df5f2576fe124d2f1123963259a638e13ebb2467e. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc792111-55e8-4c00-bb82-ff16935e1f74.json and https://artists.proofprofile.net/proofs/artist/cc792111-55e8-4c00-bb82-ff16935e1f74.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).