I realize that, but the wording in the article implies that it is Ossman's song, rather than a cover. "Maple Leaf Rag has to be his most notable recording and

I realize that, but the wording in the article implies that it is Ossman's song, rather than a cover. "Maple Leaf Rag has to be his most notable recording and is likely still a recognisable tune to most ears to this day." The reason it's recognizable is because it's a famous Joplin tune that has been recorded by many artists, not because of Ossman's version per se.