Rights and Attribution When Quoting Others' Work in Your Own
I have a composition wherein a quote short segments of two pop songs from the 60's, and base another large section on the chord progression of a third song from the same era. These are intended to invoke the era quite specifically. I attribute the songs and songwriters from which the piece borrows at the top of the sheet music.
I haven't published the piece (other than here), haven't made any money on it, and don't expect ever to make any money on it.
Am I afoul of copyright law in putting such a piece out in public? If so, is there any reasonable way to bring it inside the law?