<![CDATA[The digital transformation of the business licensing system through the Online Single Submission (OSS) has brought significant changes to government administration, including integration with the national land database. This integration is expected to accelerate public services and increase investment efficiency, but in practice, it presents various legal problems related to data validity, regulatory disharmony, and ambiguity in administrative responsibilities between institutions. The differences in character between the self-declaration mechanism in the OSS and the formal verification system in land administration give rise to potential legal data conflicts that can impact the certainty of land rights. This study seeks to analyze the configuration of the OSS system interoperability with land data, identify emerging normative conflicts, and formulate an ideal legal interoperability design to support legal certainty and protect community rights. The research method employed is normative legal research with a statutory, conceptual, and systems approach, through qualitative analysis of primary and secondary legal materials. The results show regulatory fragmentation between the investment acceleration regime and the precautionary principle in agrarian law, as well as the absence of clear legal standards regarding the hierarchy of data validity between government digital systems. This situation has the potential to trigger administrative errors, overlapping permits, and conflicts over digital data-based space. The ideal legal interoperability model is focused on establishing a legal validation layer, standardizing data validation authorities, harmonizing cross-sectoral regulations, and strengthening risk management-based governance within the SPBE ecosystem. This approach is expected to create system integration that is not only technically efficient but also aligns with the principles of legal certainty and the protection of land rights.]]>
