This is the way to search the Asset UUID of an MXF file in Spycer:
- open the MXF file in Spycer
- switch to the "Header Data" view
- skip the "Tag" list
- search for a line that ends with " - Metadata EssenceContainer"
- search a few lines below for a line starting with "material", this is the UUID that is referenced in the CPL and the other metadata files