Architect of the Capitol image

Google and some other big web sites have gone symbolically dark to protest the proposed Stop Online Piracy Act working its way through the U.S. House of Representatives and a similar bill before the Senate.

But when it comes to trying to influence how Senators might vote by pouring in campaign contributions, the tech world is falling behind rivals in Hollywood.

The non-profit campaign spending watchdog MapLight has conducted an analysis of campaign contributions from key industry groups to members of the U.S. Senate between July 1, 2005, and June 30, 2011.

Here are some details from MapLight’s number crunching:

Entertainment interest groups that support these bills gave 7.2 times as much ($14,423,991) to members of the U.S. Senate as Internet interest groups that oppose these bills ($2,011,332).

Senate Majority Leader Harry Reid (who favors the piracy crackdown) has received 4.8 times as much from entertainment interest groups that support these bills ($571,500) as from Internet interest groups that oppose these bills ($118,050).

The legislation, aimed at stopping online piracy of music and video, has the backing of the music, film and television industries. But tech companies hate it.

The proposed legislation would allow the Justice Department and copyright holders to obtain court orders to shut down websites accused of aiding or facilitating online piracy.

White House has said it would not support the proposed legislation after the tech community rallied support in several online petitions.