I will be presenting my thoughts on the subject above in the upcoming Congress of the UNCITRAL for the celebration of its 50th anniversary (4-6 July 2017).
My paper currently on the Congress website is a version which I sent to the UNCITRAL Secretariat some months ago and which no longer represents my latest thinking in some significant respects. I am asking the Secretariat to replace it with the latest version, to which I make a link from here.
The paper gives a particular emphasis on the topic of proprietary restitution of blockchain-based tokens as an area which calls for a globally unified solution.
Postscript: As from 16 June, the Congress website carries the latest version. Many thanks to the Secretariat for swiftly acting on my request.