The technology that makes this eye-catching giveaway possible is blockchain, a digital ledger that records transactions and information in a verifiable and permanent way. Blockchains have primarily been used to underpin cryptocurrencies like BitCoin and Ethereum, but they can also be used to create so-called 'smart contracts' to guarantee other agreements between two parties.

Heap offered ticketholders the chance to sign up to be part of one such contract as part of an experiment she is conducting on the potential for blockchain in the music industry.

“It has really opened my mind in terms of how it could change the way things are done,” she says. She has been working on a blockchain-based service for artists to help them keep track of where and when their work is used, and to ensure they get paid fairly.

Heap, a musician who has worked with stars including Ariana Grande and Taylor Swift, is one of a growing number of blockchain innovators who are attempting to push the boundaries in terms of how this still-emerging technology might be used. And if a new report on the Future of Work from the World Economic Forum (WEF) is to be believed, she could soon be joined by a lot more people.

WEF analysts have included “blockchain specialists” in a list of 50 occupations that will rise in importance over the next four years. And alongside this will be an increasing number of jobs.

“Among our respondents, 45% of companies state that they are likely or very likely to expand into blockchain technologies,” says Vesselina Stefanova Ratcheva, a senior analyst at the WEF and one of the authors of the report. “That figure looks different by industry.”