Well, that's one view of rights. However, most attempts to base so called natural rights (i.e. rights that are somehow intrinsic to human existence) have been largely unsuccesful. It's a tough argument to make.
Seems to me the 'inalienable rights' that are mentioned in our founding charter carry this argument quite well. I suspect they also 'prove' them as well. Proof by declaration of self-evidence? ``We hold these truths to be self-evident.... that [all humans] are endowed by their creator with certain inalienable rights." If, for some reason, I claim that the right to liberty is *not* self-evident, it can be very difficult to convince me otherwise. This is one of the difficulties of natural-rights arguments; that they tend to assert certain rights (right to privacy, right to property, right to personal space, right to free speech, &c) axiomatically when they are often the subject of the discussion. Patrick