Jem Aswad Senior Music EditorWhile recognized as a great artist in his time, much of John Coltrane’s later work was so far ahead that it took the world years, if not decades, to catch up with it.Today, in a beautiful postscript to a brilliant and all-too-short life and career, Coltrane’s masterpiece, 1965’s “A Love Supreme,” has been certified platinum by the RIAA for sales of 1 million albums in the U.S.