What you see under my promotion history is all the documentation of my rank that you need sir. The only individuals who can prove it are the coaches at my school. No outsiders. Have a good day.

Mr. Harvey, no one "needs" documentation. Many, perhaps most of the user here, welcome being vetted / validated. If you aren't interested in that, it isn't a big deal and there is certainly no need to prove anything. However, I am sure you have a picture or two of you getting promoted. That would be more than enough to support your rank, should you choose to do share them.