A cutdown is a customised scooter (usually an Italian Vespa or Lambretta) with parts of the bodywork removed or cut away. Cutdowns were popular amongst skinheads and scooterboys during the mod revival
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 0xaf6d5de6538f52f78416b46baabbf1a8b5fe639c686358190c3ff201f4470ffd. 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/df71d69b-dacd-4f49-ad35-854cbd655892.json and https://artists.proofprofile.net/proofs/artist/df71d69b-dacd-4f49-ad35-854cbd655892.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).