You make an interesting point and I want to acknowledge that, but I disagree and will try to explain why. If you take an ear of corn that belongs to me, I no longer have the corn. This is not true if you perform my song. On the other hand, I'm not sure I have some fundamental right to profit from the corn, just because I own the corn. That seems like a stretch. Similarly it seems to me very entitled to say I have some right to money because somebody else sang my song.

Your analogy gets to a distinction I've seen made between personal property -- something I own and use for myself -- and private property, something I (or a company) own and use in order to make money. As I understand it some on the socialism spectrum deny the fundamental right to own private property in this sense (though not the right to own personal property), so they would use your analogy against you.

You also get at what ownership of physical items means. Corn is easier to justify ownership over because of the effort that went into growing and tending it. A less clear case is picking fruit off a wild tree that happens to grow on someone else's property. Here again I think you would find people arguing the fruit tree belongs to some extent to everybody (e.g. some countries have laws protecting your right to hike through "my" land). So again your analogy can work against your argument, maybe ownership of this corn or fruit tree is not such a natural right either.

In summary, you say "what's lost is opportunities to make a sale" and I would not recognize that as a fundamental right. I would recognize a fundamental right to own a physical item for personal use and not have it taken from you, and I would recognize the right to say or sing whatever you want.