"I had created what I believe is the first digital-cash protocol ever to use block chains in any form - though it used them in a way very different than Bitcoin

"I had created what I believe is the first digital-cash protocol ever to use block chains in any form - though it used them in a way very different than Bitcoin and its descendants. In that protocol each 'coin' had its own little chain that grew by one link each time it was transferred from one owner to the next. Seeing the idea come around again, in a very different form, was fascinating for me." No, that is not a blockchain, but I can see what you did there, blockchain inventor.