Rob Peters wrote:If it's PD US, would it be legal for me as an EU resident to upload it?
Generally speaking, it wouldn't be legal. When you purchase a copy of a score, you obtain permission to use it "for your personal use", and, obviously, scanning and making it available to somebody else is not personal use. However, there are some tricky and very debatable scenarios that open areas of uncertainty. For example, some (most?) EU countries extend the personal use to your family and friends, so, for example, if you consider the score of a string quartet and you are one of the four players, you can legally make copies for three friends and play it with them privately (no public performance, which would extend the use to others). If one of these friends is American and you send a copy to him so that he can study the score when he is in the US, that copy would trespass the EU borderline (most likely, legally) and enter an area where it is PD, so your friend may freely copy and distribute it. VERY tricky, IMO. I am not a lawyer, and I wouldn't bet on the lawfulness of this process.