Yes, gambling sites provide us with server seeds that can be verified.
But how do we really know that these seeds are used in actual gambling process?
Isnt it possible they are just displaying server seeds and hashes that we can verify but in reality the server seeds they are using in the back-end functions of the game are actually different/rigged?
Mate sha is a technique that can'e be decrypted by anyone. Basically you get a strong from them and you add a string of yours own ahead on of it and then you do some sha operations on it to obtain a number. This is in short, there is a long procedure as you might have seen, basically if they use other seeds and shows other seeds then the result won't match with the actual roll.