Sign and check
Free, and it runs entirely on your device: your keys and files never leave it.
How it works now aviation parts
Free in your browser: the manufacturer registers the part, every shop signs what it received and what it did, and a buyer checks the certificate it was sent. A paid report adds a signed rating for lenders and insurers.
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Built from the open-source code in BSVKey/aviation-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.