Most dice sites offer the "third party verification" feature.
Provably fair was created mainly to ensure that dice sites are reliable!
That's true, but I'd still stick to more established and reputable casinos. Provably fair doesn't guarantee you will be allowed to win and cash out.
It's easy to implement provably fair function and then take people's winnings and close the site down.
But if anyone knows how to run this gambling business will not try to cheat people for small profits because these guys knows in the longer run they are going to win and they can make a good money from this business. So most established sites and some of new sites also will not do any cheating but we just need to choose the correct one.