The European Green Deal recognises seas, oceans, and environment are a source of natural and economic wealth that we must preserve. The Mission Restore our Ocean and Waters aims at contributing to these goals with measurable targets. The UN Decade of Ocean Science for Sustainable Development is promoting to unlocking science for better decision making. Data and information are key enablers to these missions and the development of an EU Digital Twin of the Ocean (EDITO) is a key priority for Europe. EDITO-Infra, is to build the EU Public Infrastructure backbone for the first European DTO by upgrading, combining and integrating key service components the Copernicus Marine Service (CMS) and the European Marine Observation and Data Network (EMODnet) into a single digital framework that can be scaled up to an overarching knowledge system integrated with the DestinE initiative. It will provide the foundation for the development of the EU DTO initiative, hosting the deployment of future DTO projects (like ILIAD), of new generation of Ocean models (underlying models project) and of the Mission lighthouses projects. Led by Mercator Ocean international (MOi) as the Entrusted Entity leading the CMS, G7 FSOI secretary, GEO Blue Planet, Ocean Prediction DCC of the UN Decade of Ocean Science, and by Flanders Marine Institute (VLIZ) as manager of EMODnet Central Portal in an agreement between DG MARE and the Flanders Government, and representing the different EMODnet implementing partners, EDITO-Infra will provide public access and use to the widest possible range of open ocean observation datasets, data products, hosting for new sources of data, modelling capacities on Cloud, GPU or HPC, and a co-working environment with the objective of making ocean knowledge available to government, private sector, citizens, and scientific experts alike, enabling them to become partners in knowledge generation so that they assemble their own twins, for the pursuit of a healthy and productive ocean.