Open Science is on the political and funding agenda on the national (DFG, BMBF, KMK) as well as on the international level. The European Commission funds the projects CRAFT-OA, DIAMAS, and PALOMERA in order to establish Diamond open access publication services. Networked institutional infrastructure for journals and books is built on high quality standards and will be integrated in platforms like the EOSC or OpenAIRE, thus supporting the formal quality and visibility of scholar-led publications. The Hamburg State and University Library (Staats- und Universitätsbibliothek Hamburg) participates in these processes. Its publication services are excellently networked on the European level. With this poster, we will explain the mentioned projects and show how publications of Hamburg researchers can benefit from these developments. This poster was being presented at the "Digital Total" in Hamburg, October 9-10, 2023. The event was organized and conducted by the House of Computing & Data Science (HCDS) of the Universität Hamburg, in collaboration with partners from the scientific platform PIER PLUS and the Academy of Sciences and Humanities in Hamburg.