Sign and check
Free, and it runs entirely on your device: your keys and files never leave it.
How it works now vehicles and batteries
Free in your browser: the carmaker signs the campaign, each vehicle signs what it installed and every log segment with its own key, and anyone can check what was running at an incident. A paid package signs it for an insurer or a court.
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Built from the open-source code in BSVKey/vehicle-custody. To sign straight from your own systems or devices, use that code directly. For paid services, such as timestamping files on the public ledger, see Do it now.