getting a verified checkmark on nostr:
in most nostr clients you can add a nip05 identifier which is basically a username and a domain as so: username@domain.com
it looks like an email address but its not
in order to get your checkmark you need to register your username with a provider that offers this service
you can do it also on your own domain but that takes a bit more effort
on duno.com you can register an account and pick a username. As soon as you add your nostr npub address to your profile,
your "username@duno.com" becomes available to be added to any of your nostr clients you use
