Im not going to lie the formula they have is very confusing to me... And they gave me the seeds for my bets to verify... And today, about 5 days later when I went to go try and verify it, I realized they have given me the seed but not the "Next server seed hash" that I would need to complete the formula...
I couldn't find any independent third party verifier, but you can always copy the python code from here and save it on a

file. Then you can run it locally after replacing the variables (balls, secret, user-seed and wager) with the right values.
I realized they have given me the seed but not the "Next server seed hash" that I would need to complete the formula...
You don't need the server seed hash to regenerate the results. In fact, you can generate them by yourself using any online tool as long as you have the server seed. They have no gain in hiding this information.
Even if they give it to you, it's useless if you didn't save it before starting the game.