@ggbutcher Glen did you ever make any progress with this…DCP-ICC
"A while back, I made some ICC profiles from Adobe DCPs, my Neutral file made a 524-byte ICC, Vivid made a 224-byte file. My guess is that there are LUT TRCs in them. Open the .json intermediate file with a text editor, and the contents are easily discernable.
I’m not at my regular computer to check, but IIRC the roadblock I ran into was the DCPs did not contain a ForwardMatrix, which is what dcamprof expected to see to populate the color primaries. At that, I gave up and went back to my Argyll-produced profiles, but I plan to restart that investigation now that I’m retired (sort of…)
Edit: My Argyll-produced camera profile is only 3.5kb, so a usable profile doesn’t have to be big…"