I suppose I mean that I don't understand how to reverse that into a URL when one is presented only with a block, or perhaps a coinbase in a transaction. Best, Peter On Tue, May 29, 2012 at 11:34 AM, Luke-Jr wrote: > On Tuesday, May 29, 2012 3:28:56 PM Peter Vessenes wrote: > > I don't understand what the 20 byte keyhash is. Can you elucidate? > > 20 byte keyhashes are a fundamental building block of the Bitcoin protocol. > > ripemd160(sha256(ecdsaPubKey)) > -- Peter J. Vessenes CEO, CoinLab M: 206.595.9839 Skype: vessenes Google+