Yes, this is it. I quickly threw up blackcoffee@nostr.cymru as a NIP5 (https://nostr.cymru/.well-known/nostr.json?name=blackcoffee) and it works swimmingly!

CC nostr:npub18ams6ewn5aj2n3wt2qawzglx9mr4nzksxhvrdc4gzrecw7n5tvjqctp424