As a whole, the blockchain trend has had a bit of an Icarus year, flying too close to the sun and being burnt for its hubris. But while it hasn’t yet fallen into the sea and drowned, as per the Greek myth, it has certainly been taken down a peg or two. There is now a great deal of skepticism, and companies and investors are taking much longer looks at the startups that have embraced the technology. To this end, Riot spoke to Constellation Labs, a startup focused on enterprise-blockchain applications, with IoT ambitions, to get some perspective on where the market has moved to. The gist of Constellation’s proposal is a data marketplace that uses a backbone based on…