I run a record label (Records On Ribs) and to be fair, SoundCloud have always scanned files for potential copyright infringement and taken files down when they have found it to be the case. The difference is that normally there is an appeals process with a nice backend. It is a little frustrating though because the automated service flags music we own the copyright for (as well as being Creative Commons) and we have to go through the whole process again. The lack of appeals here is the really worrying development.