If it were a verification badge you’d think someone would develop a technology to sign tweets / posts the same way you can sign and push a git commit, i.e. , the authentication backend would incorporate some sort of signing which requires a special token.

All this would have to be hidden from the end-user, of course, so I’m not sure what it offers on top of just knowing the user credentials.

Maybe it would have to be implemented where when you login to an app, the app also looks in iCloud or Google storage for the keys associated with your verified identity (which you have to submit documents for, and when submitting documents, your phone creates the keys). Any additional devices the user wishes to use, he or she would have to share the keys from the initial device.

Not a crypto guy, is this the gist of what actual verification would look like and what additional benefits it serves over 2FA or knowing the users password?