Are pins of WOG bridge package numbered?
The pins aren't numbered in this case, they're labeled. 

If you want to assign numbers, the orientation and ordering you've chosen is consistent with some other pin numbering formats. It's worth noting that the diagram in the datasheet is the bottom view. They helpfully did not annotate that fact, but you can see it by looking at the 3D version and the diagram together:



If you wanted top view numbering, starting with upper left and counting counter-clockwise (to be consistent with most DIP packages) the numbering is actually:

1: ~ (A)
2: −
3: ~ (B)
4: +

Otherwise, if you only use this package for this rectifier and nothing else, just use the labels and not arbitrary numbers.