Ask HN: Are there any substantial examples of blockchain solving a real problem?

There are many startups and companies involved in blockchain technology.

I’m wondering what kind of ‘significant’ problems they solve and by this is not possible with regular technology.

I have a strong sense that blockchain technology is a solution that has yet to find a relevant problem to solve.

I think the same is true for cryptocurrencies but I would like to keep those out of the discussion, if possible.