The purple icon just proves someone has done a verification. Damus then shows the domain, but not the username @ domain. Instead Damus shows the chosen username, which I appreciate because it lets me use the bitcoin B where nip-05 doesn’t allow that character.
I think you should go back to showing the username@domain under the profile user name even tho it seems a bit more cluttered, otherwise it allows someone to verify at the same verification platform, and then impersonate.