I think a reasonable solution for now would be to mail something to his physical mailing address and have him confirm the information contained within it. This would fairly positively ID that he is in fact really the original Master-P. Does this sound practical to all involved? Blazed is this something you are willing to do?
He showed me his license...I am convinced.
A picture of his ID could have easily just been snatched off of his PC...
He can easily proof this by writing a piece of paper of today's date and time and place it besides the driver's license and take another shoot to prove it. This is not that hard to do plus that even if he is good with photo editing then we could know if it is fake