I'm not believing in to probably fair system because in real life there are less possibility for continue losing streak but in almost all the to gambling houses continue losing streaks are happening most commonly. This makes we need much more improvements/developments to fine-tune so that those provably fair mechanism will be actually fair for all of us.
Honestly I'm not familiar with SHA algorithms and hashing or unhashing things which makes me unable to verify my betting.
I believe gambling houses must work on simplifying these things so that even non-computer literature people also will be able to verify them with just one click.
If you don't believe in provably fair - you probably don't understand it. This system is, perhaps, the only thing that can actually verify that a certain gambling website isn't a scam. When online casinos first started appearing lots of them were scams and back then it would be wiser to trust real-life casinos over virtual ones. But now it's quite the opposite, thanks to provably fair.
I'll try to explain it as I understand it and make it as simple as possible. Imagine that you're playing a game where you, say, have to guess a word, you tell what's your guess to a certain person and he'll then tell you if your guess is right or wrong. But how do you know if he isn't lying? In order to prove his fairness, he's holding a tablet with the encrypted right answer and, let's say, there's a certain encryption algorithm named "HAAA" that encrypts letters in numbers. And then, for instance, the word is GRASS and after performing the "HAAA" encryption you only see a set of numbers. Let's say, the following equivalents are designed within the algorithm: G is 8, R - 2, A - 4, S - 9, so what you see on the tablet is 82499 - the result of encryption. But the example I gave you is very simple and one might think that anyone can get the right answer from the numbers, but here's the coolest and very important thing about SHA256 - it only hashes one-way: you can encrypt with it, but you can't decrypt. So, what you need to do next is to go to a trusted third party that does encryptions and ask them to encrypt the word GRASS with the "HAAA" algorithm and see if they get you the set of numbers that was on the tablet. If the numbers are the same (82499 in this case) - it proves that the word was GRASS.
That's about it, hope you'll believe it now