Verify a printed document
The QR code on the printout carries the document number and a check code (the start of the SHA-256 fingerprint of the printed text). This page lays the issued original out again and compares the two.
No document to check: open this page from the QR code of the certificate demo, or try it with the sample.
How it works in your system
Set verifyUrl on the report (for example https://erp.example.com/verify?id={params.docId}&h={docHashShort}) and print a QR code with expr "verifyUrl". When you issue a document, keep its definition and data, or a snapshot, under that id on your own server. Your verify page passes a load function to createVerifierPage; the data never leaves your servers. Docs