We started in the 1990s at sustainability startups, in government, a climate technology fund, and a global certification company. ClimateCHECK was launched in 2007 to advance the state of the art for MRV (measurement, reporting, verification) and we have since delivered services and solutions to over 400 organizations in over 50 countries. We have launched innovative solutions for climate change, cleantech and sustainability every 18-24 months throughout the 2000s, 2010s and are continuing into the 2020s, for example: DigitalMRV - www.digitalmrv.earth (in cooperation with IOTA.org) ScribeHub - www.scribehub.com Collaborase - www.collaborase.com NovaSphere - www.novasphere.ca Climate Chain Coalition - www.climatechaincoalition.io (in cooperation with the UNFCCC.int and a global network) Xpansiv - www.xpansiv.com Adaptation Ledger - www.adaptationledger.com GHG Management Institute - www.ghgmi.org (in cooperation with the GHG Experts Network) The following links provide recent examples of our contributions to the body of knowledge about digital MRV for climate change: 1. Towards Ontology and Blockchain Based Measurement, Reporting, and Verification For Climate Action, submitted to SSRN October 2020 - https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3717389 2. Blockchain and Emerging Digital Technologies for Enhancing Post-2020 Climate Markets, published by the World Bank March 2018 - https://openknowledge.worldbank.org/bitstream/handle/10986/29499/124402-WP-Blockchainandemergingdigitaltechnologiesforenhancingpostclimatemarkets-PUBLIC.pdf?sequence=1&isAllowed=y 3. Blockchain for Planetary Stewardship – Using the Disruptive Force of Distributed Ledger Technology to Fight Climate Disruption, published by the Blockchain Research Institute January 2018 - https://www.transparency-partnership.net/system/files/document/Baumann_Blockchain%20for%20Planetary%20Stewardship%20Framework_Blockchain%20Research%20Institute.pdf