This poster presents the Czech Core Metadata Model (CCMM), developed collaboratively by the National Library of Technology (NTK) and the EOSC CZ Metadata Working Group, with NTK leading the conceptual and technical design. CCMM provides a structured framework for describing research datasets, harmonizing metadata across repositories, ensuring interoperability, and offering a foundational structure for emerging domain-specific data repositories within the Czech Republic, while being aligned with European and global standards.