Ago or AGO may refer to: Aviation AGO Flugzeugwerke, a German aircraft manufacturer IATA airport code for Magnolia Municipal Airport in State of Arkansas, United States People Ago of Friuli, 7th-ce
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 0x5f1d3afe24baf9061e2dd908dfcd2bbf6141ba2b2d5bc4fb835dfb317d7d207b. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/221e4487-0b67-477c-9a9c-bb1fb63b6d09.json and https://artists.proofprofile.net/proofs/artist/221e4487-0b67-477c-9a9c-bb1fb63b6d09.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).