Moneo, sometimes branded as mon€o, was an electronic purse system available on French bank cards to allow small purchases to be made without cash used from 1999 to 2015. History Moneo is based on the
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 0x1e6ce80bfd922d315a349a3974f6faa05585d6a9828cc94ab918879c86956e02. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/475132ec-f1a1-44bb-a94e-58b89951f338.json and https://artists.proofprofile.net/proofs/artist/475132ec-f1a1-44bb-a94e-58b89951f338.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).