This is wild, I just checked my own name, and I also wasn’t on the list! Check your name and add it here: ottawa.ca/en/city-hall... I’ll be following up with Elections Ottawa to find out what’s up. But on voting day, you can also just show ID or sign an attestation at the polls to be able to vote.
I've heard from many people that they can't find their name on the voters list using the online checker. In fact, I'm not on the list! Today, I wrote to the Elections Office asking them to look into the matter. I suspect the problem is with the software, not the list itself, but let's be sure!