Not sure if you had seen these:

https://blog.digitalasset.com/press-release/digital-asset-and-isda-introduce-tool-to-help-drive-adoption-of-isda-cdm.

https:www.moodysanalytics.com/regulatory-news/jan-13-20-isda-paper-examines-legal-aspects-of-smart-contracts-using-blockchain

https://uk.practicallaw.thomsonreuters.com/Document/I40312d9f35f711eaadfea82903531a62/View/FullText.html?transitionType=Default&contextData=(sc.Default)&firstPage=true