Octo may refer to: The numeral prefix "octo-", from the Latin for the number eight Octo Telematics, a company that analyses driver behaviour for insurance companies etc. Octo (automobile), a Frenc
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 0x8b31aa95f00dbd7d5b0eb87bdbaf52a50bb91e0d9eb7f5a265a283d05fc719bc. Chain 2 (Bitcoin): anchored in block 953841 (2026-06-15T22:20:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0023465d-e599-470a-9741-6a6911fb6592.json and https://artists.proofprofile.net/proofs/artist/0023465d-e599-470a-9741-6a6911fb6592.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).