Ranz was an automotive marque owned by Tianjin FAW Toyota Motor Co., Ltd. which specialises in electric cars. It was launched in April 2013 Following the showing of three concept cars between 2013 and
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 0xa7564b6117e63eec1adcd04d51e5c169584ad5f0d49f0cf0ff865cbf86dd5386. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94afec3d-a5fb-43b2-ad56-7671954d7ddb.json and https://artists.proofprofile.net/proofs/artist/94afec3d-a5fb-43b2-ad56-7671954d7ddb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).