I've seen many on here discuss the authenticity of Bob Kane pieces, with many discussing them being forged/faked. At Torpedo Con yesterday, I bought this Kane piece from a very credible dealer, who I trust significantly, but since I'm new to collecting I have anxiety over my first pickup. The first two images are of the piece I purchased, with the ones after that being similar examples seen on Heritage and the PSA website. Something interesting is that on the back of the paper the sketch is on,