Yes, its possible I remember hearing a similar discussion in bustabit or bustadice chat room (forgot which one) and they explained this kind of provably fair to one of their users that was curious. I think you can also find this topic being discussed in their main thread. There's positives and negatives to it but still possible afaik.
the what ? the verfication of bets ? or as known as provaly fair system ? and what is its negative side ? i dont think it has but i can only say that its a good idea that they implement such system because this is for their users to verify if the site is legit or not .
online gamber will be more confident if a platform is provably fair than compare to not . the topic is also on other gaambling forums and as well here too . there are explanations that have been laid out if how those stuffs work .