Best workflow for XYZ conversion

Hi,

Trying to create a DCP from a ProResHQ source file and I was wondering what was the best workflow to use to make sure no color shift occur during the process.

I've read some threads (they seem a bit old though) some of them are saying that it is better to do the XYZ conversion in After Effect while other are saying that we shouldn't touch the color management of AE and leave the conversion to OpenDCP.

Anyone have a good idea of what will be the best workflow?

Thanks a lot
Frederico