I direct you to Yakov Rekhter's various drafts and commentaries
that underline the fact that address ownership is irrelevant.
Prefixes are simply strings of bits.
What's important is the routing system.
The fact that you are registered in registry X as being
the "owner" of prefix Y is completely irrelevant if pretty
much the entire Internet is going to route X towards Z.
Now, fortunately, people are working on systems which will
keep histories of route announcements and withdrawals so we
can see which direction any given prefix was routed towards
on a more historical basis. This may be as helpful in solving
disputes as it will be in debugging routing.