Testbed-20: Integrity, Provenance, and Trust (IPT) Report http://www.opengis.net/doc/PER/t20-D00124-03324-0332025-MM-DD2024-11-082024-10-17 Paul Churchyard Jane Doe Open Geospatial Consortium OGCendraft2025 Open Geospatial Consortium OGCtestbedintegrityprovenancetrustIPTengineering-reportogctechnical