Adding a Matrix proof

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

After logging in into Matrix, join the #doipver:matrix.org 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 !dBfQZxCoGVmSTujfiv:matrix.org. 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:

https://matrix.to/#/ROOM_ID/EVENT_ID?via=...

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:

list

Select the desired user ID (make sure to replace N):

uid N

Add a new notation:

notation

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

proof@metacode.biz=matrix:u/USER_ID?org.keyoxide.r=ROOM_ID&org.keyoxide.e=EVENT_ID

So, for user @foo:matrix.org, this would be:

proof@metacode.biz=matrix:u/@foo:matrix.org?org.keyoxide.r=!dBfQZxCoGVmSTujfiv:matrix.org&org.keyoxide.e=$3dVX1nv3lmwnKxc0mgto_Sf-REVr45Z6G7LWLWal10w

Save the key:

save

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 Matrix account.