"Well, it has links to all kinds of things, but links to copyrighted material aren't its main business and it wouldn't obviously be worse off without them, nor, as far as I know, does it go out of its way to acquire those links."
Most of the material that Google links to are subject to copyright. There may or may not be material being displayed at the network node that the node owners have the right to display/distribute/disseminate or not, or indeed both.