At a first glance both the codestream syntax and the #JPH file format are relatively minor variations on #JP2, so I think it would be good to add support to #Jpylyzer at some point. Won't make any promises when I'll get round to this, but I created this issue as a reminder:

https://github.com/openpreserve/jpylyzer/issues/197

#OPFOAG Thomas Ledoux advocates for a standard #schematron edition tool to enforce institutional policies on #JHOVE, #veraPDF & #jpylyzer outputs.