That sounds odd - maybe there's something I don't know, but you can apply the CC Passport profile only to a RAW file, so I simply can't imagine how could someone apply a CCP profile to a developed jpeg or tiff. The camera profile can be applyed only when you're rendering the colors from RAW, so it's immposible to do it twice...
My understanding is this, C1Pro uses camera specific ICC profiles that they created.
Color Checker Passport uses DNG profiles.
I guess that is what confuses me, as I am not sure what exactly the difference is.
I was talking to M.R. about that, afaik he does both, using the ICC profiles in C1, and then the DNG profiles in Lightroom.
Would that be right Michael?