Let me produce a client-side javascript widget on the blog that acquires the reduced URL that a customer used arrive at your blog. As the widget could possibly get the Referrer, such would simply be the mentioning page URL, not the reduced URL which was placed on the website that needed to be clicked on. I understand shortener sites use either 301 or 302 redirects: same with the reduced URL obtainable in the header after which available to the browser and subsequently a widget? Do browsers store suck click information accessible via javascript? Can you really access off-site reduced Web addresses by any means?

Maybe calling history.previous from js can have the small url, I am unsure.