OBJ asset files can open successfully while still losing important data. The round-trip integrity check should look beyond file validity to units, hierarchy, animation, metadata, and external dependencies.
For OBJ asset, classify each important feature as preserved, translated, approximated, or dropped. Test the same file in both directions so a successful open does not hide data loss.
Export, re-import, and compare structure, transforms, materials, animation, metadata, and file size against the source. Apply this round-trip integrity guidance to the actual OBJ asset delivery path.