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This article explores the MELOS project, a collaborative initiative dedicated to the documentation and digital management of historical Greek music recordings. Developed as part of the \"Research-Create-Innovate\" program, the project integrates collections from multiple institutions into a unified, open-source platform using the ReasonableGraph system. The study focuses on the Vassilis Tsitsanis Collection, highlighting the complexities of cataloguing and analyzing Greek urban folk-popular music. By structuring metadata based on a hierarchical ontology and employing interdisciplinary methodologies, the platform enhances access to discographic material while addressing longstanding gaps in research. The article underscores the significance of commercial recordings as musicological sources, advocating for an expanded, scientifically grounded approach to their study and preservation.