Nevermind.. I kept searching and, while I didnt find the answer, I did find a link to blu-raystats.com, which I had never heard of. The answers are there.
But - followup question, I notice that on that site Mission Impossible Ghost protocol is listed as 2:35:1, but on my 2:35:1 screen, I still have some black at the top and bottom when I am exactly at the edges of the sides. So that tells me it was actually put on the disc at higher than 2:35:1. Is the data wrong?