Receipt verification

Bring the full signed receipt to POST https://hcrb.in/v1/receipt/verify or POST https://code402.dev/v1/receipt/verify. Verification is free; send JSON with a receipt field.

A digest alone cannot prove validity. To view guidance for a known digest, open /verify/<64-character hex digest>. No payment or account is required to verify a receipt.

See documentation for the machine surface.