This information is found in iTunes Cover Flow data files.
Tag ID Tag Name Writable Values / Notes 'data' ImageData N (embedded JPEG or PNG image, depending on ImageType) 'itch' Itch - --> ITC Header Tags 'item' Item - --> ITC Item Tags
Index1 Tag Name Writable Values / Notes 16 DataType N 'artw' = Artwork
Index4 Tag Name Writable Values / Notes 0 LibraryID N 2 TrackID N 4 DataLocation N 'down' = Downloaded Separately
'locl' = Local Music File5 ImageType N 7 ImageWidth N 8 ImageHeight N