For our Crash gamemode, we base our provably fair system off of something called a 'Public Seeding Event'. This is where we take a hash from a future, not-yet-mined bitcoin block and use that as the first hash in the ongoing hash chain. If you are familiar with how a blockchain operates, it is very similar to this. We hash over the previous hash to generate the next. Since we dont know what the bitcoin blocks hash will be beforehand, there is no possible way for us to guess the future outcomes.

Since our Crash games provably fair works as a hash chain, there is no settable 'client seed' like dice. Using the tool provided below, you can verify the integrity of the hash chain.