802.6 (G) Musical Works Containing Samples or Interpolation
Sampling is the incorporation of a fragment or snippet from a preexisting recorded song into a new song. Sometimes the sampled portion is looped, modified, or repeated continuously. The Office may register such works based on the original new music or lyrics that the author added to the work, but not based on the use of the sample.
Moreover, use of more than a de minimis amount of recognizable sample may be questioned for lawful inclusion.