Have you ever proven fairness of a game yourself or know someone who has or do you simply trust a casino claiming their games are provably fair?
Well... I remember having already checked some bets on the website's "validator" itself.
Despite knowing that there are independent sites that do this, I never checked my bets outside the site itself.
I just look for gambling that already have a good reputation and that I believe are reliable. Reputation is something very important and a site would hardly risk losing it.