It's only authenticated insofar as I was the one who asked him to sign it and he did. There is a picture, as well. Somewhere. I haven't ever really considered getting it officially done, though. Can't imagine it would be worth the cost.
Snagged 10 of them. With a 3 hour timer I have plenty of time. Thanks for posting. I usually don't search for transcribing either, but I can handle these. Ezpz.
[video=youtube_share;_cnzuI4fsMs]http://youtu.be/_cnzuI4fsMs[/video] "I'll throw in the black keys for free."