Tokenized environmentally friendly energy startup Sustainable Bitcoin Protocol (SBP) has completed the first clean Bitcoin mining blockchain asset transaction, CoinDesk reported. SBP issues on-chain environmental asset Sustainable Bitcoin Certificate (SBC), which represents Bitcoin mined using clean energy and is verified by a third party. Miners using clean energy can participate in the program at no additional cost. By allowing miners to sell SBCs, the protocol hopes to incentivize miners to use clean energy. Bitcoin miner CleanSpark has sold SBC to Melanion Digital, the digital assets arm of alternative investment and asset management firm Melanion Capital, CoinDesk said, citing a press release.