If you take a look at the details page for any of the bets you can see how the outcome is calculated.  The bets from yesterday (like http://greenishblue.info/terradice/8b94569a6e5d2d94d8e4b81e791445b8db6e6ecfb3f92596f70d5a834a685660-1.html) will have the secret revealed so that the outcome can be verified while ones from today will just have {secret} displayed until the day is over and it moves on to the next secret in the list.

Note that while writing this I attempted to verify that bet and found there is an extra newline in the middle of the hash that makes it somewhat more difficult to calculate/check.  I have adjusted that so it will be a single line in future bets, but when checking older ones you will have to insert a newline between the secret and the ":" to get the same hash.  This doesn't affect the randomness, just makes it somewhat harder to verify the fairness of the results.