Big Motor () was a Japanese automotive retailer. Formerly the largest used car dealer in Japan, in 2023 the company was hit by a series of scandals and allegations of widespread, systematic insurance
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 0x92aa883f1e78aa65f6c9fb8bb1d6398d65f90bbb8a67cba576e65880bd510433. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6662f6c4-34aa-4459-92dc-aae647588ae7.json and https://artists.proofprofile.net/proofs/artist/6662f6c4-34aa-4459-92dc-aae647588ae7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).