The Other Ragtime March

According to https://www.youtube.com/watch?v=IST0BBnrmwM, the name "The Ragtime March" is taken, so this is "The Other Ragtime March".

After listening to so many "March and Two-Step" ragtime pieces, I started wondering--how come they're not in march form? So I was determined to write a rag in march form.

It started sounding more and more like a march. Is a piece like this, perhaps, how John Philip Sousa would write rags? That this is in the easiest of concert band keys (and a fairly common ragtime key), B flat major, makes this sound even more like a march.

I suspect I took the theme in Bars 38-43 from somewhere else, but I can't remember the tune's name. Do any of you recognize it and can name it? Please write a comment with its name if you do, and I'll edit the description with it!

...I later found out that there is a rag in a form similar to mine, complete with breakstrains, called Popularity. As shown in https://www.youtube.com/watch?v=irkYGvSPuro, it is by George Cohan and it was published in 1906. ...I don't think I come up with much innovation in ragtime that hasn't already been covered.

(Structure: Intro-A-A-B-B-C-D-C-D-C)