From an OPERAS Blog Post:
A final report on the results of the post-publication open peer review experiment that took place from October 2018 to June 2019 within the HIRMEOS project has been published.
The project has included the implementation of an annotation service on the OpenEdition Books platform. In order to support the implementation of this tool on the platform, an experimental phase was set up. The purpose of this experiment was to explore, through annotation, new open peer review practices (post-publication) on open access monographs in the humanities and social sciences.
Direct to Full Text Final Report: “A Post-Publication Open Peer Review Experiment With Annotations”