I just did the update from DP2. It didn't wipe my data as reported in another post. I also got the verification error message, but when I checked my build number, I found I was on the latest production build. So it appears that the message is deceiving.
You can check if you're on a beta or production build by rebooting your device. If you're on the beta, you'll see the beta startup message after it boots. If not, you're on a production build.