There should be a way to provide /etc/containers/registries.d/default.yaml [1] for the image signature importer controller. We need to implement and document how to configure sigstore in 4.x. [1]: https://docs.openshift.com/container-platform/3.11/admin_guide/image_signatures.html
Thanks, Oleg! Since there is no way to configure sigstore in 4.x, bug verification of 1722568 is blocked.
Moving this to JIRA, per RFE process: https://jira.coreos.com/browse/DEVEXP-380