So title of literally anything is ok for represented products? I remember an album which had some game or anime op/ed song and an op/ed song for a jp cooking show. Represented products field had of course title of that game or anime (can't remember exactly) but didn't have the title of that cooking show.
Don't get me wrong, I'm all for correction :D
edit: so here
http://vgmdb.net/album/23503
the other track is used for advertising "Green Cola" drink. (according to joshinweb). Should Green Cola be entered as a represented product here? Or every time when checking info on some anime op/ed single if another song is used for... NHK drama (random example, seen that too) the title of the drama should be also entered?