Possible, with great care. You have to rotate the motor so all pistons are below tdc, then rotate the cams by hand to be sure all valves are fully closing (very slim possibility they will). If you get very lucky, then you could put on a new belt and check compression. The problem is that a bent vavle will usually not fully close. A bent valve is the most probable result of a broken belt, followed by piston and head damage. Valves are steel. Pistons are aluminum. You can get piston damage ranging from just dents to broken piston crowns.

Not responsible for advice not taken...