Ownership as a whole is a social/legal construct, no? [1] You only "own" something insofar as you control it. Societies build frameworks that aid people in controlling things based on who they think deserves control of those things. This clearly can vary widely between societies; the USA used to think owning people was perfectly OK and some places still do. Nobody has absolute control over (almost?) anything, and I think if a society provides many legal protections to something like a voice (who can profit off of it, who goes to jail if they try to copy it), it can be "owned" to as meaningful an extent as anything else.
[1]: https://en.wikipedia.org/wiki/Ownership