Sign and check
Free, and it runs entirely on your device: your keys and files never leave it.
How it works now robotics
Free: robots sign for every item they take and pay per handoff, even offline, and anyone can check who holds what. A paid statement settles the money between operators.
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Built from the open-source code in BSVKey/robotics-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.