The world is facing simultaneous biodiversity and climate crises. Pressure is mounting from governments and the general public to rapidly roll out a global programme of well-executed nature-based solutions to sequester several giga-tons of carbon each year and protect biodiversity. Over 100 world leaders at COP26 pledged to end deforestation by 2030. Our urgent challenge is figuring out how to verify that deforestation solutions are working, and tracking the associated carbon credits used to offset necessary emissions. The Cambridge Centre for Carbon Credits (4C) is creating a trusted decentralized marketplace where purchasers of carbon credits can confidently and directly fund trusted nature-based projects that ties together corporate funders to conservationists via automated and transparent global oracles.