Blockchain is getting bigger at Big Blue.
Demand for the technology, best known for supporting bitcoin, is growing so much that it will be one of the largest users of capacity next year at about 60 data centers that International Business Machines Corp. rents out to other companies around the globe. IBM was one of the first big companies to see blockchain’s promise, contributing code to an open-source effort and encouraging startups to try the technology on its cloud for free.