Hi Ara, I think this is a great idea and is analogous to Renewable Energy Credit / Certificates (RECs).
As I posted in reply to an earlier post the “Green energy” or renewable energy procurement is tracked using Renewable Energy Credit / Certificates (RECs). More can be found from the resources here: Renewable Energy Certificates | CRS
Intro video: What Is a Renewable Energy Certificate? - YouTube
There are a variety of markets for RECs and there are additional criteria that can be put on the RECs to meet certain goals (e.g. vintage, location, generation source).
I’m happy to go into this future if it is helpful and I do find the analogy an interesting comparison, which might identify potential solutions for the procurement challenges.