Why is my commit unverified?
Unverified means your signature is wrong. This can be if you commit with the wrong E-Mail/Password, if you haven't uploaded the Signature on GitHub(on that account) or if you've uploaded it wrongly.
Why can't i verify my GitHub account?
Error page after clicking verification link
If you click on the link in the confirmation email within 24 hours and you are directed to an error page, you should ensure that you're signed into the correct account on GitHub.com. Sign out of your personal account on GitHub.com. Quit and restart your browser.