Add a visual indicator that the beacon value was validated

Since behind the hood there's a signature verification and all taking place, it might be nice to have a visual indicator saying it was validated against public key XYZ.
We could have a field with the signature value and a check mark next to it? Maybe below the random value.

Start by locating the page or component that displays the beacon's random value and the existing signature-verification flow. Define the visual treatment for a successful validation, including whether to show the signature or public key, and consider the work done when the interface clearly indicates that the displayed value was validated.

Written by the indexing model from the issue text.