I've setup a nip5 on my Nostr account. It's the way they verify accounts. Once you get past the ambiguities in the instructions, it basically boils down to putting a file containing some json formatted text on a server accessible at a known path and add it to a domain name that you control. The difficult part is that it's not very obvious what text exactly you have to put in the file. You have to add your 'name', but your Nostr profile has 3 fields that look like names.
Here is my nip5 config.
This note birthed the blog post: I’ve setup a nip5 on my Nostr account. #