Copyright info in Canada can be found at the CMRRA (Canadian Music Recording Rights Association) site - http://www.cmrra.ca/default.html
If you're in the States, I think you have to go through the Harry Fox Agency.

Here's what the CMRRA site had for "Waltzing with Bears" (and as a sidenote, "traditional" doesn't sound right for that song, but I'm not presenting myself as an expert by any stretch of the imagination):


Song Number:        386357        

Song Title:        WALTZING WITH BEARS        
Writer(s):        TRADITIONAL
                MARXEN(ARR)        
        
Publisher(s):        
TOMORROW RIVER MUSIC        
Not Represented
        
Note:
This entry is for MECHANICAL licensing
The publisher name(s) listed above may or may not also reflect the ownership of this song with respect to SYNCHRONIZATION licensing. Please contact CMRRA for further details about any territorial limitations for synchronization licensing purposes.