QNB Group has moved its US dollar corporate payment operations to a blockchain-based platform operated by JPMorgan Chase, marking another step forward in how big banks are starting to use the technology behind digital currencies for everyday transactions. The Qatar-headquartered bank announced Monday that it now uses JPMorgan’s Kinexys Digital Payments system to handle dollar payments for business customers in Qatar. The new setup lets payments go through in minutes at any time of the day, including weekends.