The OCB community has the broad and deep scientific expertise needed to create sensible, transparent, and reproducible practices around Measuring, Reporting and Verifying (MRV) carbon removal by the ocean. This in-person workshop is designed for those with background knowledge in marine CDR already so we can collectively grapple with the science needed to measure and verify CDR in marine environments. At this workshop, the 5 main sessions will focus on: 1) the MRV organizational and regulatory structures that could be applied to the field of marine CDR, and the data and research requirements that result; 2) The capabilities and limitations of current technologies and the opportunities associated with emerging innovations that will likely underpin MRV; 3) The role of numerical modeling in MRV; 4) Environmental and ecosystem impacts that influence MRV; and 5) How MRV structures and uncertainty may intersect with marine policy and environmental justice. Our closing session will focus on the existing landscape of funding and recommendations for marine CDR research from the perspectives of academia, nonprofits, government, and private-sector interests and the future role of OCB in this network. This workshop was organized by the Ocean Carbon Biogeochemistry Program in collaboration with the US Global Change Research Program (US GCRP), the Carbon Cycle Interagency Working Group, and the North American Carbon Program (NACP), who are hosting a parallel workshop on Carbon Dioxide Removal in August . We encourage participants to consider registering for the preceding NACP workshop (virtual). A catalogue of pre-reads, pre-listens, and pre-watches will be circulated in advance to establish a baseline shared knowledge of CDR concepts.