With the success of Blockchain technologies in preventing the double-spend issue in cryptocurrency, a new technology company is applying this approach to stem the incredible rise in digital advertising fraud. More conservative estimations of $7.2 bln dollars wasted on digital marketing fraud from the Association of National Advertisers in 2016 pale in comparison to the $16.4 bln estimated for 2017 by multinational advertising company WPP. This is a multi-billion dollar problem that is showing no signs of slowing down. 'The proof-of-history Blockchain will use a ledger to record all digital advertising impressions that it has access to. With a reported 10,000 plus registered users and an ICO in which token sales are reportedly upwards of $3 mln, digital advertisers are clearly sensing a potentially game-changing fraud buster.