Red Fez (Witmark 1908)

Cinderella (Witmark, 1908)
Uncle Dudley (Witmark, 1908)

Jolly Clowns (Witmark, 1908)
The American Symphony Orchestra plays O'Hare's arrangement of
Howard Whitney's The Jolly Clowns
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Edison advertisement

The Teddy Bears Picnic (Witmark, 1908)

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Edison advertisement
New Columbian Brass Band's recording of O'Hare's arrangement; posted to YouTube;
performance copyrighted New Columbian Brass Band, George Foreman, conductor. 
Recordings available on amazon.com and elsewhere.

Dandelion Rag (Witmark, 1909, arranged for orchestra)

Temptation Rag (Witmark, 1909, arranged for band)
Pearl of Persia (Carl Fischer, 1909)
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Edison catalog advertisement
Arthur Pryor's Band playing O'Hare's arrangement; posted to YouTube by Onkel Greifenklau
Charme d'Amour (Witmark 1909 & 1914)
The Sky Flyer (Witmark, 1910)
Charme d'Amour on Evans piano roll #2003; midi from IAMMP converted to mp3
Download O'Hare's The Sky Flyer orchestration from Ohio State University
The Copyright renewal identifies J. B. Walter as a pseudonym of well-known composer John W. Bratton:

Frisco Rag (Witmark, 1910) 

The Thoroughbred (Witmark, 1911)

Roulette Reel (Witmark 1911)
Note instructions for playing at different venues
Universal piano roll 96995 (1911)

Pirouette  (Witmark 1911)

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Anna Pavlova
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Less appropriate cover art, but with a dedicated to ballerina Anna Pavlova
Listen to the Peerless Orchestra's recording of Pirouette, which conveys the ballerina's light-footedness and pirouettes.

Black Diamond Rag (Witmark 1912)

Listen to the New York Military Band play Black Diamond Rag

Up and Doing (Witmark, 1912)

QRS roll #31312; source:  IAMPP
Tokio Rag (Witmark, 1912)
Listen to a digitized Tokio Rag

March Progressive (Witmark, 1912)

Persian Princess (Witmark, 1912)

The Chimes (Witmark, 1912)
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Sheet music from Witmark's authorized dealer in London
Mont Alto Motion Picture Orchestra recording provided by Rodney Sauer, Mont Alto director; performance copyrighted by Mont Alto.

Tango Land (Witmark, 1912)

Listen to O'Hare's arrangement of Tango Land played by the Victor Military Band
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Also arranged by O'Hare for band

Pepper Pot (Witmark, 1913)

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Harold Ivers was a pseudonym of George J. Trinkaus, a Witmark staff arranger for many years. For example, Trinkaus arranged several of O'Hare's original pieces for mandolin orchestra.
Listen to the Victor Military Band playing what is almost certainly O'Hare's arrangement of Pepper Pot
Magic Love (Oliver Ditson, 1914)
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from The Musician, March 1915
Salute to the Colors (Theo. Presser, 1921)
O'Hare had already begun arranging music for school vocal ensembles and had composed and arranged one orchestral piece, especially for school orchestras--Colonia Overture (Oliver Ditson, 1917).  Salute to the Flag is his school orchestra arrangement of a march by Bert R. Anthony, composer of salon and teaching pieces for piano. 
Background image, top of page:  Cover detail from The Story of the House of Witmark:  From Ragtime to Swingtime