If your bike is new, it could well be the cosmoline. Thorough cleaning and time would take care of that.
The cam cover gasket is the next most likely cause. This happens to (too) many of these bikes, probably a combination of poor design and less than perfect assembly at the factory. Luckily, it's also easily fixed, and is covered under warranty.
Another simple possibility is leaking banjo bolts at the oil cooler line connections, also easily fixed.
A few people have had leaks in worse places, one or two have had porous castings in the engine, but that is unusual.
I'd clean the entire upper engine area thoroughly and try to determine where it's coming from, or even if it comes back. Remember that oil can blow back and wind up in unlikely places that are not near the source of leakage.
Some people have mentioned a UV dye that you can put in the oil to help trace leaks, which might be helpful if you decide it's not the cosmoline.