Michael Arrington reports that Myspace is set to clamp down on copyright infringement through a deal with digital entertainment company

Gracenote

.

The agreement, he says, will see the social networking giant detecting and blocking copyrighted music that is placed on its site – part of online communities’ efforts to build relationships with big media groups.

Since its $1.65bn acquisition by Google, YouTube has complied with some copyright owners’ requests to remove unlicensed videos, while also encouraging media firms to share ad revenues based on use of their content.

Copyright owners also seem to be stepping up their legal actions against other sites in a bid to get a better bargaining position when negotiating those deals.