Other than cryptocurrencies, where is blockchain used? A study cannot find anyplace, only tests, proof of concept, etc.

A Blockchain Study Finds 0.00% Blockchain Success Rate. The study reported also reported 0 vendor call backs when asked for evidence of implementation.

Though Blockchain has been touted as the answer to everything, a study of 43 solutions advanced in the international development sector has found exactly no evidence of success.

Three practitioners including erstwhile blockchain enthusiast John Burg, a Fellow at the US Agency for International Development (USAID), looked at instances of the distributed crypto ledger being used in a wide range of situations by NGOs, contractors and agencies. But they drew a complete blank.

"We found a proliferation of press releases, white papers, and persuasively written articles," Burg et al wrote on Thursday. "However, we found no documentation or evidence of the results blockchain was purported to have achieved in these claims. We also did not find lessons learned or practical insights, as are available for other technologies in development."

Blockchain vendors were keen to puff the merits of the technology, but when the three asked for proof of success in the field, it all went very quiet.

"We fared no better when we reached out directly to several blockchain firms, via email, phone, and in person. Not one was willing to share data on program results, MERL [monitoring, evaluation, research and learning] processes, or adaptive management for potential scale-up. Despite all the hype about how blockchain will bring unheralded transparency to processes and operations in low-trust environments, the industry is itself opaque."