iTunes Information to Filemaker

Hi, I'm trying to gain access to the unique track id (if any) that itunes stores for each track. It's not included when the library or playlist is exported.

My purpose is to use this primary key (id) to create playlist information in filemaker and use this unique id for updating records and to avoid importing duplicate files.

Creating my own id would not be useful. I am assuming of course that each song out there receives a unique serial number when it's registered.

Thanks for any help and ideas.