I recently bought the Man-Tank (https://www.renderosity.com/mod/bcs/man-tank/122258/) and just happened to read the ownership statement.

Its a derivative work using parts of Chibi Tank, https://www.blendswap.com/blends/view/75174.

Well I was curious about that, so I went to the link and it mentions that Chibi Tank is licensed under CC 3.0 (which allows commercial use but requires attribution and a link to the license).

So the question is: does that mean only Cybertenko needs to attribute the original work, or do I need to attribute the original work as well, if I use the derivative work, Man-Tank, in a commercial animation?