Interesting, my original understanding was that they were using the blockchain for uniqueness for Corda, but it looks like it's optional: https://r3cev.com/blog

Interesting, my original understanding was that they were using the blockchain for uniqueness for Corda, but it looks like it's optional: https://r3cev.com/blog/2016/4/4/introducing-r3-corda-a-distributed-ledger-designed-for-financial-services https://r3cev.com/blog/2016/4/4/introducing-r3-corda-a-distr... This somewhat makes sense since one of Corda's departures is that consensus and validation are limited in scope to the participants.