From what i can see it does look a little more like copper. One thing i do when doing bronze, (using metallic paints, i use GW) is the very end it highlighted with shining gold, but very little. Bronze tends to have an almost golden appearance to it. Also i agree about the varying degrees of verdigris. I use Scaly green, hawk turquoise, dark flesh, and random mixes of paints to give it different colours in different places.
Hope this helps, Gary.