Soundcloud did the same thing to me....accidentally removed one of my tracks due to it being aparentally a Pitbull track...so I heard the pitbull track they've been trying to tell me is similar with....reported them back...and got my track back up again....and most of my tracks were being....copyrighted...from a website I used to upload my files to...that protects copyrights...on my behalf...incase some one else uploads my tracks...but they wouldn't allow me to upload them to my own cahnnel...even if I told them.....that its my original channel....I asked them for the past year already to remove my tracks...and I no longer require their services....but the support is sad on there....they won't do anything....and also....youtube doesn't take it down for sampling.......cuz I do have a couple of rap beats...that I've used basic Synths.....off some other tracks...or the ones royalty free ones people share and allow for production....withfull rights....those ones...they warn me about...and I acknowledge them....but there are tracks that I've worked on without sampling anything....and they got taken down...and it pisses me off.