Great to see this, wanted to invest in a solid dice site for some time now. Took a detailed look at you platform, everything seems solid.

One question, in the provably fair, you use the very secure HMAC-SHA512 to generate the rolls - this is the industry standard. However, the hash of the seed is displayed with SHA256. Would it not be more prudent to standardize the hash in all cases to the more secure SHA512 algorithm? Better safe than sorry...