When the work of art is context itself that makes perfect sense. In „Black square“ by Malevich it was not the black square that was the artistic invention, but

When the work of art is context itself that makes perfect sense. In „Black square“ by Malevich it was not the black square that was the artistic invention, but where he placed it at exhibition. Copyright must not prevent such uses of images, so it is perfectly normal for Warhol to transform the images the way he did. The copyright was infringed by the foundation which was supposed to preserve the works, not to alter them by licensing for the use not intended by author.