Thanks for the background, @Aelthwyn!
There's a difference between game connected data (updated automatically) and user entered data (on the honor system). While I would certainly trust someone from such a prestigious and important guild, it does pose certain problems in general with verifications. Granted, screenshots can be modified, computers can be hacked, etc.
Unless someone has a better idea, in the meantime, I'll just add a note that it's user entered with ToDo Monitor. Also you'll need to remember to subtract more than 10 when the new classes get added. Not ideal, but with the note, I'll leave it to the readers discretion.