ISO 26262 requires for each item the creation of a safety case. Such creation is extremely time-consuming. Currently, no satisfying approach is at disposal to speed up such creation. OSLC (Open Services for Lifecycle Collaboration) is a standard for tool interoperability, which, if enabled, permits effective documentation management, needed for efficient safety case creation. OSLC defines a set of extensible core specifications (domains), each of which focuses on a single phase of the life-cycle. In our previous work, we provided ISO 26262-compliant domain extensions. In this paper, we use such extensions to pioneer the creation of OSLC-based safety cases. In particular, we show how information exposed via such extensions can be queried to produce compositional pieces of safety case-fragments, arguing about requirements traceability and satisfiability. We illustrate the production of such fragments for an Electronic Control Unitmodule in use at Scania. We then discuss our findings.