I checked your 'contact me' page and notice you have an email address and a mobile phone number published, as well as your IRC details. I'd think that's enough to prove who you are to anyone that's interested. They email you, you reply. If they have doubts after that, it's their own problem. It's interesting to consider whether or not someone could claim someone else's blog as their own. If I was applying for a writing job I could hand out the web address for someone's blog who's a far better writer than me and how would the employer know? I guess it would be up to the employer to have the initiative to test it in some way.