This paper discusses the complex process of reconciliation of data coming from research and public cultural heritage institutions with their own selection criteria that have shaped the provenance of their collections. We demonstrate how the Golden Agents digital humanities research infrastructure can play an intersecting role as intermediary data provider between these distributed collections in the reconciliation, disambiguation and deduplication of data by taking their provenance into account. To this end we analyse an art historical case we call ‘The Montias Case’, with data from three different sources: the Getty Provenance Index, the Frick Collection, and the notarial acts of the Amsterdam City Archives.