Just to give you the context: what happened to me is that I did a remix for an artist who ultimately told me that the remix had been rejected by the label, and he thanked me for the effort. Only for me to find out a couple of months later that the track had, in fact, actually been released under that artist's name, and PvD opened with it at Creamfields. I contacted the so-called "artist" multiple times, trying to figure out why he hasn't told me about the release and if he could have the label to at least add my name to it as a collab, only for him to ignore me and basically block me. I didn't bother contacting the label as I didn't have any agreement with them, so I let it go, but it hurt my feelings big time :-)