COLOR SPACE at export in Prores

Merry Christmas everybody !

We edited a feature film in Premiere Pro and preparing for final steps of postproduction now.

Source material is from a Canon C300 Mark 2 (98%) and in smaller amounts also Sony Alpha 7s Mark II (2%).

As there was plenty of reframing and panning done, the postproduction facility who will do the color grading agreed to work on a Prores 4444 file (rebuilding all the reframing would be way to time consuming / expensive). The Prores file for grading we want to export from our Premiere Pro timeline.

Only requirement by the postproduction facility is, that the Prores files have to have the same color space like our source material.

My question now - how do I make sure this works properly ? I understand Premiere Pro does not have any opportunity to edit / change color spaces. But what happens upon reframing shots ? Is this considered an effect and some background RGB conversion applies ?

Our idea for an exporting workflow is to separate Canon and Sony materials to their own timeline and export each one out of Premiere Pro as a Prores 4444 - with the following key settings in the Premiere Pro export window:

Format: Quicktime

Preset: Match Source (rewrap)

Video Codes: Prores 4444

Check Box: "Render at Maximum Depth"

Check Box: "Use Maximum Render Quality"

Uncheck Box: "Use Previews"

As the whole process of color space management is happening in the background, I hope this will present us with a decent outcome and not compromise our footage...

Is there anything of importance to consider ? Any trap - or anything else we might have missed ?

Any comment or advice on this would be highly appreciated !