User blog comment:Pelinal Whitestrake/The true meaning of C0DA/@comment-1600847-20150113175453

Here's how I view TES lore/canon: if it appears in a Bethesda developped game (single player TES games), a TES game they helped write the story for (Elder Scrolls Online), or a TES book they helped write the story for (Infernal City and Lord of Souls), then it's canon.

Anything else, it might be, but it's unconfirmed. This makes it a lot simpler, for me anyways.