The vast number of innovative projects within the new blockchain paradigm have enabled decentralized money (Bitcoin, and many many others), decentralized contracts (e.g. Ethereum, Neo, EOS), and more recently, decentralized finance (e.g. Augur, Kyber, Compound, UniSwap). Every blockchain up until now has, however, been a form of gifting economy, with only the payment token tracked on the ledger; any movement of the item that was paid for is either down to trust or the engagement of a third party. The Zenotta system provides a bi-directional accounting, through the dual double entry ledger, of both the payment AND the asset, facilitating a real economy for the first time. The seller pledges to the network a real asset (which would take the form of a Smart Data file created through the Zenotta data protocol) and the buyer pledges some native tokens. Through the dual double-entry blockchain ledger, both halves of the trade are authenticated and the transaction is packaged into a block where the Smart Data asset and the tokens used to pay for the asset are exchanged between two wallets simultaneously. In the advent of any error or lack of correct authentication, the trade would roll back to the seller, who would simply retain possession of their provably scarce Smart Data asset, while the buyer retains possession of their tokens.