A Creative Commons license allows you to let your readers know, specifically, what they can and cannot do with your blog’s content. Should you choose to license the content of your blog, you may visit the Choose a License page at the organization’s official website.
Complete the form found there and, when finished, click on the Select a License button. Finally, select the image you’d like to use for your license, and copy the code found in the text box (illustrated in the image below).
You may then paste this code into a text widget on your blog sidebar.