Is Dragon Ball Super considered canon? Is Dragon Ball Super considered an original works by Akira Toriyama?
This really depends on what you consider canon, but for now let's define "canon" as material that's covered in the original source material and has impact on the story.                   

Since this season does have a manga adaptation and takes place after Kid Buu Saga from Dragon Ball Z but before the tournament with Uub, I would say that this is canon material.



But, After seeing more then the first episode I think its safe to say that the anime does not follow the manga 100%. Therefore I consider it somewhat canon.