Yes, CANONIC is a Scrabble word!

Letter values in Scrabble US: C 3, A 1, N 1, O 1, N 1, I 1, C 3.

Is it a valid word?

CANONIC is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

appearing in a biblical canon
of or relating to or required by canon law
reduced to the simplest and most significant form possible without loss of generality
conforming to orthodox or recognized rules