When you're having copyright issue, it will be said that your content has been claimed by other right? But this time there is no any MCN that claim my content, it just said that I must proof commercial right to use content, so I did and I submitted. Until now, it's still under review.you might reup videos. thats why youtube ask to submit commercial proof. Try editing video and then upload. You have to find proper setting to edit a video so it can bypass it.
Other method i hear to bypass (!) is to submit your original videos and when youtube start monetizing your video normally without asking proof then submit that particular video you are having prob.