Best known as the technology behind cryptocurrencies like Bitcoin, blockchain is set to revolutionise many areas of life and work over the coming years. Blockchain provides a way of simply, securely and transparently recording and validating transactions. Rather than being stored on a central database, information related to the transaction is distributed across millions of computers, which makes it almost impossible to tamper with. Among other applications, blockchain has the potential to solve numerous challenges for sustainability certification and dramatically increase supply chain transparency and efficiencies.