Google have provided instructions on how to verify your blog or site. Here's a step by step (this assumes you've already (1) signed up with Google Sitemaps as per my previous post; and (2) for Add Site, entered the URL of your blog e.g. http://megatzanuar.blogspot.com in my case):
Login to Sitemaps.
Against the name of the blog or site you want to verify, under the Site Verified? column, click the Verify link:
You get a new page. In the Choose verification method dropdown, pick Add a META Tag:
A box appears under the dropdown, with some code in...