While carbon market actors are reaching a consensus on core criteria for high integrity forest carbon credits, many challenges remain for projects and programs as implementation ramps up. One immediate challenge is in the alignment and coordination of data in allocating jurisdictional baselines in Verra’s VM0048 methodology and ART TREES, the jurisdictional REDD+ standard, which has major implications for the viability of project investment and distribution of carbon revenues. This event will provide an opportunity for the establishing of best practice in how data is presented, coordinated and used in the development of nested jurisdictional crediting systems. We will identify promising approaches for alignment of REDD+ baselines by spotlighting the experiences of projects, jurisdictions, and other actors holding possibly competing priorities. This discussion will investigate the implications for credit integrity during the transition to nested programs.