I would be interested in knowing available ways to determine if cinavia is detected through the USB port on current models. 4K movies would be played via the original disc so I'm interested in BR movies. I can think of one way. Find a BR and if Bert says it has Cinavia, go to a brick and mortar store and try one or more players using mkv. I would rather not modify the firmware. In looking at manuals, all I can see is that Cinavia technology is used on this player. If this isn't the easiest way, I'm up for suggestions.