If you are not familiar with the oc command, refer to OpenShift - Getting Started with the oc command.

The oc get clusterserviceversions (or just oc get csv) command can be used to list your Cluster Service Versions (CSVs).

~]$ oc get clusterserviceversions --namespace openshift-logging
NAME                             DISPLAY                            VERSION   REPLACES                         PHASE
cluster-logging.v5.6.15          Red Hat OpenShift Logging          5.6.15    cluster-logging.v5.6.14          Succeeded
elasticsearch-operator.v5.6.15   OpenShift Elasticsearch Operator   5.6.15    elasticsearch-operator.v5.6.14   Succeeded