Q: Are copyright laws halachically binding on account of dina d’malchusa?
A: Rema (C.M. 369:11) writes that dina d’malchusa applies to governmental issues or those for societal benefit. Therefore, since copyright laws are for societal benefit, many authorities maintain that they are binding on account of dina d’malchusa, certainly in light of their widespread acceptance.
For example, Rav Moshe Halberstam, zt”l, writes that a law for the benefit of a profession that does not contradict Torah law, that fairness requires (“v’asisa hayashar v’hatov”), and that is a set rule of dina d’malchusa, is binding even in Eretz Yisrael (cited in Mishnas Zechuyos Hayotzer, p. 121).