You have to make a public records request. Click the Contact the Lottery link way down at the bottom of the calottery site, and you'll get the email link. They take a while to respond, or maybe its just for me.
I also requested that they provide at least a daily download of hot spot data. Some other states provide this. The more people bug them about this, the better. I got some data a long time ago, but really interested in same day or previous day data should be provided for download on website.
Sample of data looks like this:
winnums 1.00 C a l i f o r n i a L o t t e r y Page: 174
CDC: 9243 / Fri Apr-22-2011 HOT SPOT HISTORICAL INFORMATION Sat Apr-23-2011 03:00:49
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DATE DRAW WINNING NUMBERS B/E
-------- ------- ---------------------------------------------------------------
04/22/11 1614551 01 05 06 08 12 19 20 36 38 39 40 41 47 52 53 54 57 70 73 78 06
04/22/11 1614552 04 11 12 13 16 17 21 24 27 34 41 48 50 55 57 62 66 73 75 79 48
04/22/11 1614553 01 04 07 09 11 15 16 28 32 38 40 45 46 49 54 64 66 72 73 74 45