I think you're missing the point. Yes, the IP 
does belong to the studio. However, the scan (not 
the copyright) does belong to the person who 
scanned it. 

Although owning the scan is not a particularly 
valuable asset, the scan was still something that 
was made by you and therefore is your property. 

It's as if you took a photo of a MacDonalds logo 
at the restaurant. You don't own the logo, the 
restaurant, the arches, or copyrights. 
Nonetheless, the photo still belongs to you even 
though you can't use it for advertising since the 
logo belongs to big Mac. 

- Chi