Yep. "Signature or it didn't happen" is my protocol
Discussion
HOw would you know what Joe Biden (or any prominent persons) digitial signature was or whether they had an assistant using their key?
I don't know tbh. Does verification need to have multiple layers on top of each other? I may research this
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?