Sure it does. In multiple places. Subject to a few rules. You can't kill a slave outright, but if he lives to the next day after a beating it's no sin, just property loss.
I believe there are some rules and limitations on slave trading, but not on ownership. If you have the misfortune of being a slave, you are forbidden to disobey your master.
Ironically, your views about what the Scripture says about slavery are identical to the views that were held by those you're decrying.