I don't know tbh. Does verification need to have multiple layers on top of each other? I may research this
Discussion
At some level a social consensus builds up for accepting a private key signing as that individual. How do you know the Nostr account for nostr:npub1qny3tkh0acurzla8x3zy4nhrjz5zd8l9sy9jys09umwng00manysew95gx is really him for example?