Adding a Matrix proof

Let’s add a decentralized Matrix proof to your OpenPGP keys.

Sending a proof message

After logging in into Matrix, join the room and send the following message (make sure to replace FINGERPRINT)

[Verifying my OpenPGP key: openpgp4fpr:FINGERPRINT]

Click on “View Source” for that message, you should now see the value for room_id and event_id.

The value for room_id should be ! The value for event_id is unique to your message.

If your Matrix client does not support “View Source”, choose “Share” or “Permalink”. The URL obtained should look like this:

Update the PGP key

First, edit the key (make sure to replace FINGERPRINT):

gpg --edit-key FINGERPRINT

Add a new notation:


Enter the notation (make sure to replace USER_ID, ROOM_ID, EVENT_ID):

So, for user, this would be:!$3dVX1nv3lmwnKxc0mgto_Sf-REVr45Z6G7LWLWal10w

Save the key:


Upload the key to WKD or use the following command to upload the key to (make sure to replace FINGERPRINT):

gpg --keyserver hkps:// --send-keys FINGERPRINT

And you’re done! Reload your profile page, it should now show a Matrix account.