Abstract For many consortia and libraries, open access is a driver for change in both license management and research support. Reaching 100% compliant open access with limited budgets is challenging for both institutions and researchers. An important success factor is the availability of open access management data. However, the lack of data format standards and a limited set of persistent identifiers, makes it impossible to easily combine open access related metadata sets, let alone use it for trusted business intelligence and decision support. To get a grip on this chaotic playing field, UKB, the network of Dutch University libraries, started building a data warehouse in 2020. The first data services for both consortium and libraries were launched within a year. By the end of 2022 the datahub contained a rich, structured and controlled metadata set related to more than 300.000 peer reviewed articles, written by Dutch (co-) authors over the last five years inside and outside (consortium) publishing ...