Does the estate of Scott Joplin get a cut of the ice cream man's take?

It only seems fair, since the truck is playing The Entertainer. I know that tune warms me up and makes me think about buying some ice cream. It works better on me than the irritating tunes those trucks usually play. And where does one get that tinkling, music box version of the song?

Next time, I'm going to stop and ask the guy.