does redirection link like dot.tk or dot.co.cc affects the ability of blogger community website to verify ur site, such as blogcatalog
and bloggerunited to get the thumbnail of ur blog?

i mean do u nid to put ur real add for them to verify or a redirection link will work too?

Depends, like dot.co.cc allows you to have DNS control over your domain, so if you point it to the domain/blogspot correctly, you can use the dot.co.cc address

As for dot.tk , it uses iframe redirection if im not mistaken, for that one, use your actual URL