In December 2018 the Kunsthaus Zürich has published a complete list of its collection of approximately 4,000 paintings and sculptures with provenances, which is available here. The Kunsthaus collection is also published with images in a comprehensive catalogue. While the Museum states that 'there do not appear to be any cases of unjust enrichment at the expense of an individual seller in personal distress', most of the provenances are incomplete for the Nazi era.
Supported by a grant from the Swiss Federal Office of Culture (BAK), a current project aims to research and make public the provenance of all new acquisitions made by the Collection of Prints and Drawings from 1933 to 1950. Initial results were to be published online in autumn 2018 on the Kunsthaus website but these have not yet appeared. A Provenance Information overview in on the Kunsthaus site here.