Easiest way to check a dice roll is simply wait 10 minutes after you make the roll, refresh the page then click the text inside the dice. Click submit on the page in the user center to generate the verification php code.
To verify the seed matches the precommitment first find the seed in the php code, looks like this
"3cb4d99d898d7194572d3ab1b6fa3ce04bb79e12eed88628ec439f73e312e8ed" /* server seed */
Since this suggestion has already been implemented, it's safe to say that it's been approved, so I'm locking this thread and moving it to Approved Suggestions.