Blockchain/ Distributed Ledger

I think we will need to use STRIDE with a risk scoring methodology for continuity of analysis. Microsoft used DREAD to supplement STRIDE but noted it may not work for  software-centric threat modeling which I don't think is our case.

There is another view on threat modeling that empathizes the use of Process Flow Diagrams (PDF) instead of Data Flow Diagrams (DFD) as per the VAST methodology focusing on operational risks (see https://threatmodeler.com/threat-modeling-methodologies-overview-for-your-business/)

Conclusion: I think STRIDE will work and we can use the free tool provided by MS, but we also need a risk scoring methodology.

I will upload couple of resources regarding threat modeling, for your consideration here:
https://circle.cloudsecurityalliance.org/viewdocument/frameworks-and-methodologies?CommunityKey=a9786cbe-105a-420f-a353-8bbe10ab684d&tab=librarydocuments