Let's add a decentralized Mastodon proof to your OpenPGP keys.
Update the Mastodon account
Log in to your Mastodon instance and click on Edit profile.
Add a new item under Profile metadata with the label OpenPGP and your PGP fingerprint as the content, or with the label Keyoxide and your Keyoxide profile URL as the content.
Update the PGP key
First, edit the key (make sure to replace FINGERPRINT):
gpg --edit-key FINGERPRINT
Get a list of user IDs and find the index of the one to assign the notation to:
Select the desired user ID (make sure to replace N):
Add a new notation:
Enter the notation (make sure to update the link):
Save the key:
Upload the key to WKD or use the following command to upload the key to keys.openpgp.org (make sure to replace FINGERPRINT):
gpg --keyserver hkps://keys.openpgp.org --send-keys FINGERPRINT
And you're done! Reload your profile page, it should now show a verified Mastodon account.