First of all, you have to check if your instance is registered or not:

[I] ❯ keybase prove --list-services

The output will be something like this:

Supported services are:,,,,,,,, dns,,,,,,, github, hackernews, http, https,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, reddit,,,,,,,,,,,,,,, twitter,, web,,,

This list will be longer and longer as more instances are added so maybe with grep it’s easier to figure out if it’s on the list or not:

[I] ❯ keybase prove --list-services | grep -o "quey\S\+",

It’s on the list

Simply call prove:

[I] ❯ keybase prove
Your username on efertone
Please click on the following link to post to

https://{long long url}

Checking will continue while you go authorize the proof on
To cancel hit C-c.

Open that long url, log in if you are not logged in and basically you are done ;)

If it’s not on the list

Contact with one of the administrators of your instance.