Simply put, if a video uploaded on YouTube contains any copyrighted material, it can receive an automated Content ID Claim. Their system scans for copyrighted material and places a claim on any video containing copyrighted works - whether a license is in place or not. Content ID claims are issued on behalf of individuals and organizations that own music, movies, TV shows, and other media in order to protect them from copyright infringement, or the unlawful use of their work. Since we are not a royalty-free site, our artists/labels have an agreement with YouTube that allows them to claim videos as a way to track and monetize the use of their songs.
If you receive a Content ID claim, it only means that the system found copyrighted material in your project.