You only need to record a few in a row until you hit the hash on which they cheat?
Just download OBS, and record whenever you free roll.
If you are right you are onto something big, big enough it is worth to effort to record a free roll.
Not worth it on my part to check it because I believe they dont cheat with the free roll, and honestly free coins is free coins to me.
Might be a bad way to look at it but I dont put too much effort into clicking on that site anyway. Its a once a hour set and forget kinda thing.