> hen, if you get targeted by a license holder the burden is passed to the people that told you they had the license.
Well, not really. The contract you propose will merely give this guy the right to sue his client. He'll still directly owe the moeny to the person making the copyright claim, because that's how liability works.
Right, it's a chain. The burden is still on the guy at the top and the shit rolls downhill.
What I want to know is -- what would stop a photographer anonymously uploading his entire portfolio to Wikimedia and then suing them for publishing all his images?
Well, not really. The contract you propose will merely give this guy the right to sue his client. He'll still directly owe the moeny to the person making the copyright claim, because that's how liability works.