Because the composer/artist has to be dead for many years for the copyright to expire (in the United states 70 years after the death; cf. https://en.wikipedia.o

Because the composer/artist has to be dead for many years for the copyright to expire (in the United states 70 years after the death; cf. https://en.wikipedia.org/w/index.php?title=List_of_countries%27_copyright_lengths&oldid=741251504#Table https://en.wikipedia.org/w/index.php?title=List_of_countries...).