I am planning on putting out a mixtape pretty soon and I was wondering, can my producer sample other artists work for beats without us paying for it and can I rhyme over other artists beats without paying to use them an putting them on the tape if I do not plan to profit off of it? Basically everything being used is original and ours but I practice rhyming over beats by DJ Premier and whatnot and if I write something hot enough maybe I'd want to throw it on the tape.