Supply chains operate like a "hall of mirrors" with billions, if not trillions, of document copies (and copies of copies) duplicated between parties. The result? Enormous complexity. Tracking, reconciling and verifying this torrent of inventory, purchases, invoices, bills of lading, shipments and receipts is hugely challenging. But there’s a solution. With blockchain strategies in place, substantial cost and efficiency benefits are achievable. And problems with reconciliation, miscommunication and poor contract enforcement can evaporate.