You must signup for AllTrack using your legal name. Your legal name is required to process royalty payments to you.
You will have the opportunity to add any applicable stage name in the “Performer” field of each song that you register. This way, if you write a song for another performer, if you perform in multiple bands or groups, or if you perform solo under multiple stage names, you can still register each song to your single AllTrack account. This ensures that your royalties from all performer sources are combined and directed back to your legal name.
You can register for a free AllTrack creator account here.