An independent test in 2009 uploaded multiple versions of the same song to YouTube and concluded that while the system was "surprisingly resilient" in finding copyright violations in the audio tracks of videos, it was not infallible. Karim did not attend the party and denied that it had occurred, but https://www.linkedin.com/feed/update/urn:li:share:7356320248985194496/?actorCompanyId=77283885