In all cases you have the same container flagging (ProRes also has correct private frames headers flagging, but DNxHR/Cineform not). Best to relay on MOV flagging. In this case: colr, clli and mdcv tags. Those fully describe HDR content.
DNxHR also stores range info in ACLR tag. ProRes has no range info as it should be rather always limited range (although you can make full range file as well). Cineform has no known range flagging either.
Link:
https://drive.google.com/open?id=1Dm...3Pni2cSGvTQ1hq
Values for different standards HDR10, HLG etc are the same as for h265. Mediainfo has support for all those tags.