Yes, we’re aware of a number of different BCT platforms which are capable of servicing supply chain traceability business needs. Ethereum and Hyperledger Fabric are just 2 examples.
These platforms don’t talk to each other however - they are not interoperable. So if I’m a brand owner and have suppliers using different platforms I have no common language to discover and access data.
You are correct that there hasn’t been significant implementation - but there’s lots of experimenting occurring and the list of those using BCT and those offering solutions based on BCT grows daily. You could look at the IBM Food Trust as a relevant example. Olam Foundation and Origin Trail are additional examples.