thumb|left|San Pietro e Paolo Church Monno (Camunian: ) is a village and comune in the province of Brescia, in Lombardy. It is situated above the right bank of the river Oglio, in upper Val Camonica.
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 0xb7757716f5367b76bea20ae56deb92cbb28523b6c1ae19296a531c64116c4c85. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c086f4c2-3b06-4183-a6c6-d3c23612cb3f.json and https://artists.proofprofile.net/proofs/artist/c086f4c2-3b06-4183-a6c6-d3c23612cb3f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).