If you read the notice, you'll see that absolutely nowhere did they claim that they owned the copyright to the code. They claimed that the code was being used to infringe on copyrighted works. There are no lies in the notice and no perjury. Nearly everything the notice is factual. The only claim that needs a little support is the claim that PopCornTime's predominant purpose and use is for copyright infringement, but that would take about five minutes to convince a reasonable person.