The oddest thing about this legal argument of UMG is that, while they claim that this takedown mechanism is a purely private arrangement that is nothing to do w

The oddest thing about this legal argument of UMG is that, while they claim that this takedown mechanism is a purely private arrangement that is nothing to do with the DMCA, the mechanism was pretty explicitly added to fulfill the safe harbor clause of the act. Lawyer please: does the relationship between the takedown mechanism and the DMCA invalidate UMGs defense?