Energy Web, a non-profit organization, has launched a free sustainability registry for bitcoin miners called Green Proofs of Bitcoin (GP4BTC). The registry will score miners on two metrics that take into account the mix of energy they use: their purchases of renewable energy credits (RECs) and their participation in demand response programs.
The project aims to act as a "certification layer" that can be referenced by different organizations based on what the miner wants to share. The registry is currently free, but Energy Web may introduce a fee for miners looking to get certified or for users looking to access the data in the future.
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