Jenna,
Thanks for digging up these links. They all three appear to be based in Nashville.
Now, this could just be a guy using Matt's name to get attention. Only, wouldn't you use a bigger name if you wanted attention? Or if you wanted AI attention, wouldn't you talk about recording a demo for someone from the current season that is known to have a debut coming out, like Lee, Crystal or Casey?
So, I think it is probably legitimate that this is a demo for Matt. I'm just curious about why now.