Yes, I would say the domain configured correctly. All the DNS servers (except one in Russia) provide my public IP address.
From inside my LAN, I can use the public IP and get to the Bitnami welcome page. But externally, from the internet, I cannot. I'm not redirected, I just get "The connection has timed out" error.
I have not updated ownCloud's hostname because at this point I just want to get to Bitnami's welcome page. But thanks for the link because I will need that soon.
One idea I found on a Ubuntu forum is a that maybe my ISP is blocking the port. I was going to give them a call this evening.