BTW, the NBA will never answer questions about that, I've sent the same letter and gotten the same auto-reply.
But I got the sportsnetwork log for ya, looks like 7:43pm EST. Log is at
http://www.sportsnetwork.com/default.asp?c=sportsnetwork&page=nba/scores/live/P124498.htm
End of 1st quarter Chicago 24 MIAMI 18 03/29 20:06:31 ET
MIAMI 18 End of 1st quarter.
1 Qtr 0:39 Chicago 22 MIAMI 18 03/29 20:05:18 ET
1 Qtr 2:11 Chicago 17 MIAMI 16 03/29 20:00:26 ET
1 Qtr 3:35 Chicago 16 MIAMI 12 03/29 19:57:50 ET
1 Qtr 5:46 Chicago 12 MIAMI 12 03/29 19:54:56 ET
1 Qtr 7:07 Chicago 10 MIAMI 9 03/29 19:50:31 ET
1 Qtr 8:28 Chicago 8 MIAMI 6 03/29 19:48:29 ET
1 Qtr 9:20 MIAMI 6 Chicago 5 03/29 19:46:35 ET
1 Qtr 9:50 MIAMI 6 Chicago 3 03/29 19:45:22 ET
1 Qtr 10:40 MIAMI 4 Chicago 2 03/29 19:44:33 ET
1 Qtr 11:55 Chicago 0 MIAMI 0 03/29 19:43:00 ET
MIAMI 0 Game just under way.
7:30 PM Chicago 0 MIAMI 0 03/29 10:05:09 ET