Thanksgiving week I’m selling frozen sourdough bread and dinner rolls.  Thawing/heating directions?

Okay so I think that the safest way to thaw and reheat Sourdough bread is to take it out of the freezer and let it thaw completely and then reheat it at 450 for about 10 minutes

You’ll probably see other people say something like, “oh you can just take it straight out of the freezer and put it in your oven at 325F and let that cook until it’s warmed through”

But then how do you know if it’s warm all the way through, right?

So I think the safest thing to do is to just to let it thaw and then reheat it at 450 for 10 minutes.