There is the story of “Men at Work” song: “Land Down Under”
in which a copyright holder of an Australian Girl Guides theme song (”The Kookaburra”) claimed enough of a song in the recording as “stolen”. Wound its way through Aussie courts to a 6 figure settlement. For what, from before 1940 was generally thought to be a folk song. An amazing tale.
Writer Colin Hay (the main writer for that group)- still tours, acoustic shows- pretty talented guy.
Colin Hay was in a few episodes of “Scrubs”