You can subscribe within the CBC TV app on iOS. Only Apple iTunes currently offers CBC Premium Membership subscription.
Install the CBC TV app on your iPhone, iPad or Apple TV.
Log in and tap 'Try Premium" in the menu to upgrade your membership and start your 1 month free trial.
Log in to the iTunes Store to continue with purchase.
If you enjoy this service and do not cancel after the free trial ends, then your subscription will automatically continue. Premium Membership is coming soon to all devices.