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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e36598af65b3f25c59507527ddc25802ac65a419934fc4d681cc460ba487d33. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/553952df-113a-41f4-9ccf-776b9ce0c618.json and https://artists.proofprofile.net/proofs/artist/553952df-113a-41f4-9ccf-776b9ce0c618.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).