modelGUID and projectGUID are important for troubleshooting
we know how to get them
and have utilities to extract them when file is open.
but when the file is corrupted and cannot be opened, it is not that easy.
Please expose that information in BIM360 DOCs. It could be similar to how you already expose it in Collaborate? see snapshots below
thanks
in design collaboration you can see useful information in Publish logs >details

however in BIM360 DOCs this information is not exposed
