I created 10 million powerball entries for tonight's drawing and put them in a file. The sha256 of that file is the private key to 1rn4UCAmX5vK4JdRtEZr84EPiBX8nzVoj, which I deposited 0.0001 btc as proof the file existed before the drawing.

I'll check my numbers and release the private key if I win (along with file location for proof).

Odds: 292 million to 1, so I'm still a huge underdog.