The Bible says it is. But that's a fair question. I think that with ownership comes responsibility especially if it is a child. Can you sell it? We already do when we send way for social security numbers so that we can "deduct" them on our tax forms. My daughter will probably thank me one day when she learns that I, rather than sell her to the government, refused to claim her as a deduction of it meant getting her numbered.
Of course the other option is that the State owns you and your children in the manner you claim to disdain in Cuba.