Falla_Fan wrote:1925 was eighty-some years ago.
Yes, but Copland died as recently as 1990. In most countries, the date of publication isn't the important thing, the date of death of the composer is, so Copland will be protected by copyright for a very long time.
In the US, publication date is important for many works, because (as I understand it), the law changed in 1923, and everything that was in the public domain prior to that stayed in the public domain.
For Copland, the combination of 1) not much published before 1923, and 2) died recently, means that the vast majority of his works are out of bounds for a very long time. In countries where publication date doesn't matter, then the "died recently" part will keep him in copyright anyway.
You may want to read:http://imslp.org/wiki/IMSLP:Copyright_Made_Simple
and it's more thorough counterpart:http://imslp.org/wiki/Public_domain