diff --git a/agent-module/plugins/external/src/main/resources/META-INF/pinpoint/type-providers/h2-type-provider.yml b/agent-module/plugins/external/src/main/resources/META-INF/pinpoint/type-providers/h2-type-provider.yml
new file mode 100644
index 000000000000..b202e13d0675
--- /dev/null
+++ b/agent-module/plugins/external/src/main/resources/META-INF/pinpoint/type-providers/h2-type-provider.yml
@@ -0,0 +1,14 @@
+serviceTypes:
+  - code: 2750
+    name: 'H2'
+    desc: 'H2'
+    property:
+      terminal: true
+      includeDestinationId: true
+  - code: 2751
+    name: 'H2_EXECUTE_QUERY'
+    desc: 'H2_EXECUTE_QUERY'
+    property:
+      recordStatistics: true
+      terminal: true
+      includeDestinationId: true
diff --git a/otlptrace/otlptrace-collector/src/main/java/com/navercorp/pinpoint/otlp/trace/collector/mapper/OtlpDbSystemTypeResolver.java b/otlptrace/otlptrace-collector/src/main/java/com/navercorp/pinpoint/otlp/trace/collector/mapper/OtlpDbSystemTypeResolver.java
index e3bda68ae145..9b5aa553df45 100644
--- a/otlptrace/otlptrace-collector/src/main/java/com/navercorp/pinpoint/otlp/trace/collector/mapper/OtlpDbSystemTypeResolver.java
+++ b/otlptrace/otlptrace-collector/src/main/java/com/navercorp/pinpoint/otlp/trace/collector/mapper/OtlpDbSystemTypeResolver.java
@@ -20,6 +20,7 @@
 import com.navercorp.pinpoint.loader.service.ServiceTypeRegistryService;
 
 import java.util.HashMap;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Objects;
 
@@ -73,7 +74,7 @@ public class OtlpDbSystemTypeResolver {
     private static void put(Map<String, String[]> map, String baseName, String executeQueryName, String... dbSystemKeys) {
         String[] names = {baseName, executeQueryName};
         for (String key : dbSystemKeys) {
-            map.put(key, names);
+            map.put(normalizeDbSystem(key), names);
         }
     }
 
@@ -106,7 +107,7 @@ short resolveBaseCode(String dbSystem) {
         if (dbSystem == null) {
             return DEFAULT_BASE;
         }
-        short[] codes = codeMap.get(dbSystem);
+        short[] codes = codeMap.get(normalizeDbSystem(dbSystem));
         return codes != null ? codes[0] : DEFAULT_BASE;
     }
 
@@ -114,7 +115,11 @@ short resolveExecuteQueryCode(String dbSystem) {
         if (dbSystem == null) {
             return DEFAULT_EXECUTE_QUERY;
         }
-        short[] codes = codeMap.get(dbSystem);
+        short[] codes = codeMap.get(normalizeDbSystem(dbSystem));
         return codes != null ? codes[1] : DEFAULT_EXECUTE_QUERY;
     }
+
+    private static String normalizeDbSystem(String dbSystem) {
+        return dbSystem.trim().toLowerCase(Locale.ROOT);
+    }
 }
diff --git a/otlptrace/otlptrace-collector/src/test/java/com/navercorp/pinpoint/otlp/trace/collector/mapper/OtlpDbSystemTypeResolverTest.java b/otlptrace/otlptrace-collector/src/test/java/com/navercorp/pinpoint/otlp/trace/collector/mapper/OtlpDbSystemTypeResolverTest.java
index 89b13e6ff53e..62bf3fff88b7 100644
--- a/otlptrace/otlptrace-collector/src/test/java/com/navercorp/pinpoint/otlp/trace/collector/mapper/OtlpDbSystemTypeResolverTest.java
+++ b/otlptrace/otlptrace-collector/src/test/java/com/navercorp/pinpoint/otlp/trace/collector/mapper/OtlpDbSystemTypeResolverTest.java
@@ -132,6 +132,12 @@ void resolveBaseCode_legacyAliases() {
         assertThat(resolver.resolveBaseCode("h2")).isEqualTo((short) 2750);
     }
 
+    @Test
+    void resolveBaseCode_normalizesDbSystem() {
+        assertThat(resolver.resolveBaseCode(" H2DATABASE ")).isEqualTo((short) 2750);
+        assertThat(resolver.resolveBaseCode(" H2 ")).isEqualTo((short) 2750);
+    }
+
     @Test
     void resolveExecuteQueryCode_legacyAliases() {
         assertThat(resolver.resolveExecuteQueryCode("mssql")).isEqualTo((short) 2251);
@@ -141,6 +147,12 @@ void resolveExecuteQueryCode_legacyAliases() {
         assertThat(resolver.resolveExecuteQueryCode("h2")).isEqualTo((short) 2751);
     }
 
+    @Test
+    void resolveExecuteQueryCode_normalizesDbSystem() {
+        assertThat(resolver.resolveExecuteQueryCode(" H2DATABASE ")).isEqualTo((short) 2751);
+        assertThat(resolver.resolveExecuteQueryCode(" H2 ")).isEqualTo((short) 2751);
+    }
+
     // =======================================================================
     // null / unknown → UNKNOWN_DB fallback
     // =======================================================================
diff --git a/otlptrace/otlptrace-collector/src/test/java/com/navercorp/pinpoint/otlp/trace/collector/mapper/OtlpTraceSpanEventMapperTest.java b/otlptrace/otlptrace-collector/src/test/java/com/navercorp/pinpoint/otlp/trace/collector/mapper/OtlpTraceSpanEventMapperTest.java
index ba195c1db55f..317565b40248 100644
--- a/otlptrace/otlptrace-collector/src/test/java/com/navercorp/pinpoint/otlp/trace/collector/mapper/OtlpTraceSpanEventMapperTest.java
+++ b/otlptrace/otlptrace-collector/src/test/java/com/navercorp/pinpoint/otlp/trace/collector/mapper/OtlpTraceSpanEventMapperTest.java
@@ -23,15 +23,16 @@
 
 class OtlpTraceSpanEventMapperTest {
 
-    // Stub registry pre-loaded with the client-side RPC ServiceTypes so client/RPC dispatch
-    // tests resolve to the real plugin codes. DB / messaging resolvers fall back gracefully
-    // when their plugin names are absent.
+    // Stub registry pre-loaded with the ServiceTypes needed for targeted dispatch tests.
+    // Unregistered DB / messaging plugin names still fall back gracefully.
     private static final ServiceTypeRegistryService TEST_REGISTRY = buildRegistry();
 
     private static ServiceTypeRegistryService buildRegistry() {
         Map<String, ServiceType> byName = new HashMap<>();
         byName.put("GRPC",                   ServiceTypeFactory.of(9160, "GRPC",                   "GRPC"));
         byName.put("APACHE_DUBBO_CONSUMER",  ServiceTypeFactory.of(9997, "APACHE_DUBBO_CONSUMER",  "APACHE_DUBBO_CONSUMER"));
+        byName.put("H2",                     ServiceTypeFactory.of(2750, "H2",                     "H2"));
+        byName.put("H2_EXECUTE_QUERY",       ServiceTypeFactory.of(2751, "H2_EXECUTE_QUERY",       "H2_EXECUTE_QUERY"));
         return new ServiceTypeRegistryService() {
             @Override
             public ServiceType findServiceType(int serviceType) {
@@ -403,6 +404,28 @@ void map_producer_activemq_destinationIdIsQueueName() {
         assertThat(event.getDestinationId()).isEqualTo("orders.queue");
     }
 
+    @Test
+    void map_database_h2StableDbSystemName_setsH2ServiceType() {
+        Span span = span(Span.SpanKind.SPAN_KIND_CLIENT,
+                kv("db.system.name", strVal("h2database")),
+                kv("db.namespace", strVal("mem:testdb")));
+
+        SpanEventBo event = mapSingle(span);
+        assertThat(event.getServiceType()).isEqualTo((short) 2750); // H2
+        assertThat(event.getDestinationId()).isEqualTo("mem:testdb");
+    }
+
+    @Test
+    void map_database_h2LegacyDbSystem_setsH2ExecuteQueryServiceType() {
+        Span span = span(Span.SpanKind.SPAN_KIND_CLIENT,
+                kv("db.system", strVal("h2")),
+                kv("db.statement", strVal("SELECT 1")));
+
+        SpanEventBo event = mapSingle(span);
+        assertThat(event.getServiceType()).isEqualTo((short) 2751); // H2_EXECUTE_QUERY
+        assertThat(event.getDestinationId()).isEqualTo("h2");
+    }
+
     @Test
     void map_client_grpc_setsGrpcServiceType() {
         // OTel grpc-1.6 agent emits rpc.system="grpc" on the client-side instrumenter.