In July 2011, during its European tour, the chorus competed in the Summa Cum Laude International Youth Music Festival in Vienna for the first time, and placed 2nd in the treble category.
In the summer of 2017, the CCOC toured Prague, Krakow and Budapest with their production of Brundibar by Hans Krasa.
On October 26, 2017, the CCOC celebrated their 50th anniversary with a concert titled "Ruby's Gold" at the Four Seasons Centre.
The evening was hosted by tenor Ben Heppner and featured many Canadian singers including Krisztina Szabó, Simone Osborne, Measha Brueggergosman and Andrew Haji, many of whom are CCOC alumni.
The CCOC performs often; in addition to COC productions, they perform with the Toronto Symphony Orchestra,[1] Soundstreams Canada, the Hannaford Street Silver Band, Art of Time Ensemble, and The Tenors as well as in their own shows.