I was actually just working on a post on this topic, but I take it from another angle. I think they'll compliment one another well. Whenever we examine a philosophical concept, we have the concept itself to explore (which you've done here) and then two directions to explore from it: forward and back, or "extrapolation" and "derivation". When we look at what it means to own something, specifically self, I think it's crucial to understand both directions. So, from what do we derive self ownership? Why do only you own you? Because you are the only one that inhabits you. You exist in time (self-evident), and you are the only one who inhabits this existence. This informs the concept of self-ownership greatly and gives foundation to the notion that you are responsible for this existence and what you do with it.

Great post, Danilo. :-)