[semi spoiler alert]
After the movie, around the time it was coming out, Billy finally played in public and retook the record. I have the feeling he had that up his sleeve all along but he didn't want to do it for the movie people. Or he had some master plan to make a really dramatic performance but it somehow went awry.
I also wonder where the Japanese are. It's unbelievable to me that so many old American guys hold the records, and not a bunch of Japanese teenagers.