When you type in the characters from step 4 of the guide above, your Lattice’s ID key signs that message and exports that signature along with the certificate. The data is displayed as a QR code and can be scanned, bringing the user to a gridplus.io subdomain page which informs them whether both the Lattice1’s ID key signed the provided message (what the user just typed in should be on the page as the message) AND if the card’s ID key was itself signed by the card issuer - GridPlus (if it was, you will see the verified checkmark). This is what the page the QR code sends you to should look like: