The work has been done on a voluntary basis under the auspices of the Standards Working Group of the Hyperledger Climate Action and Accounting Special Interest Group (CA2-SIG) since 2021. The Nova Institute sponsored two rounds of one-month internships for four and three students respectively to a total value of approximately 1500 USD. The value of the ongoing voluntary work by the core team since 2021 has not been calculated but is substantial. 