You are required to provide a copyright notice on your work, such as putting (c) rhino 2016 in the liner notes. Nothing precludes you from licensing that copyright in any way you want, such as Creative Commons. As long as you aren't in violation of the last sentence (your work is not primarily the samples, and you actually made a song with them), then others should be able to use your work with no restrictions other than what you yourself place on the work.
The purpose of requiring a copyright notice on derivative works is to give notice of who the actual author is and distance the original author from the derivative work. If you take their samples and make a song that is later at the center of a lawsuit (copyright, defamation, etc), the the copyright notice will hopefully steer people first to the derivative author and not the original author. That is the purpose of the clause in the copyright grant above.