You can check the valves if you like but you will most likely not find any bent. But if you want piece of mind then by all means do so.
in my years of experience and doing many of these timing belt replacements i have yet to come across one that has had the valves damaged from a timing belt problem because in the majority of failures i have witnessed the belt wears and jumps teeth during the start phase of cranking and not while running.
I suppose there is a remote chance it may happen but i've never seen it happen.