Very nice, this is very similar to an idea I had kicking around for QR codes. I was looking to smash a bitmap or pixel art into it and start adding extra charac

Very nice, this is very similar to an idea I had kicking around for QR codes. I was looking to smash a bitmap or pixel art into it and start adding extra characters into the URL to minimize the error rate, trying to find the closest unmodified QR code. Then just route that URL or create a rewrite rule to display the page you want. There's a possibility that a good code could be converged on but if the crypto is good enough it should be difficult. I haven't done any research at all though, I could be way off base.