diff --git a/exporters/logging-otlp/src/test/java/io/opentelemetry/exporter/logging/otlp/OtlpJsonLoggingLogRecordExporterTest.java b/exporters/logging-otlp/src/test/java/io/opentelemetry/exporter/logging/otlp/OtlpJsonLoggingLogRecordExporterTest.java
index a3a3dd0ceb8..27ce4c3ea99 100644
--- a/exporters/logging-otlp/src/test/java/io/opentelemetry/exporter/logging/otlp/OtlpJsonLoggingLogRecordExporterTest.java
+++ b/exporters/logging-otlp/src/test/java/io/opentelemetry/exporter/logging/otlp/OtlpJsonLoggingLogRecordExporterTest.java
@@ -48,7 +48,8 @@ class OtlpJsonLoggingLogRecordExporterTest {
           .setBody("body1")
           .setSeverity(Severity.INFO)
           .setSeverityText("INFO")
-          .setTimestamp(1631533710L, TimeUnit.MILLISECONDS)
+          .setTimestamp(100L, TimeUnit.NANOSECONDS)
+          .setObservedTimestamp(200L, TimeUnit.NANOSECONDS)
           .setAttributes(Attributes.of(stringKey("animal"), "cat", longKey("lives"), 9L))
           .setSpanContext(
               SpanContext.create(
@@ -66,7 +67,8 @@ class OtlpJsonLoggingLogRecordExporterTest {
           .setBody("body2")
           .setSeverity(Severity.INFO)
           .setSeverityText("INFO")
-          .setTimestamp(1631533710L, TimeUnit.MILLISECONDS)
+          .setTimestamp(100L, TimeUnit.NANOSECONDS)
+          .setObservedTimestamp(200L, TimeUnit.NANOSECONDS)
           .setAttributes(Attributes.of(booleanKey("important"), true))
           .setSpanContext(
               SpanContext.create(
@@ -110,7 +112,8 @@ void log() throws Exception {
             + "       \"version\":\"2\""
             + "     },"
             + "     \"logRecords\": [{"
-            + "       \"timeUnixNano\":\"1631533710000000\","
+            + "       \"timeUnixNano\":\"100\","
+            + "       \"observedTimeUnixNano\":\"200\","
             + "       \"severityNumber\":9,"
             + "       \"severityText\":\"INFO\","
             + "       \"body\": {"
@@ -137,7 +140,8 @@ void log() throws Exception {
             + "       }]"
             + "     },"
             + "     \"logRecords\": [{"
-            + "       \"timeUnixNano\":\"1631533710000000\","
+            + "       \"timeUnixNano\":\"100\","
+            + "       \"observedTimeUnixNano\":\"200\","
             + "       \"severityNumber\":9,"
             + "       \"severityText\":\"INFO\","
             + "       \"body\": {"
diff --git a/exporters/otlp/common/src/main/java/io/opentelemetry/exporter/internal/otlp/logs/LogMarshaler.java b/exporters/otlp/common/src/main/java/io/opentelemetry/exporter/internal/otlp/logs/LogMarshaler.java
index 2c230a7d3d5..bd2c6b3b8a2 100644
--- a/exporters/otlp/common/src/main/java/io/opentelemetry/exporter/internal/otlp/logs/LogMarshaler.java
+++ b/exporters/otlp/common/src/main/java/io/opentelemetry/exporter/internal/otlp/logs/LogMarshaler.java
@@ -27,6 +27,7 @@ final class LogMarshaler extends MarshalerWithSize {
   private static final String INVALID_SPAN_ID = SpanId.getInvalid();
 
   private final long timeUnixNano;
+  private final long observedTimeUnixNano;
   private final ProtoEnumInfo severityNumber;
   private final byte[] severityText;
   private final MarshalerWithSize anyValueMarshaler;
@@ -47,6 +48,7 @@ static LogMarshaler create(LogRecordData logRecordData) {
     SpanContext spanContext = logRecordData.getSpanContext();
     return new LogMarshaler(
         logRecordData.getTimestampEpochNanos(),
+        logRecordData.getObservedTimestampEpochNanos(),
         toProtoSeverityNumber(logRecordData.getSeverity()),
         MarshalerUtil.toBytes(logRecordData.getSeverityText()),
         anyValueMarshaler,
@@ -59,6 +61,7 @@ static LogMarshaler create(LogRecordData logRecordData) {
 
   private LogMarshaler(
       long timeUnixNano,
+      long observedTimeUnixNano,
       ProtoEnumInfo severityNumber,
       byte[] severityText,
       MarshalerWithSize anyValueMarshaler,
@@ -70,6 +73,7 @@ private LogMarshaler(
     super(
         calculateSize(
             timeUnixNano,
+            observedTimeUnixNano,
             severityNumber,
             severityText,
             anyValueMarshaler,
@@ -79,6 +83,7 @@ private LogMarshaler(
             traceId,
             spanId));
     this.timeUnixNano = timeUnixNano;
+    this.observedTimeUnixNano = observedTimeUnixNano;
     this.traceId = traceId;
     this.spanId = spanId;
     this.traceFlags = traceFlags;
@@ -93,6 +98,8 @@ private LogMarshaler(
   protected void writeTo(Serializer output) throws IOException {
     output.serializeFixed64(LogRecord.TIME_UNIX_NANO, timeUnixNano);
 
+    output.serializeFixed64(LogRecord.OBSERVED_TIME_UNIX_NANO, observedTimeUnixNano);
+
     output.serializeEnum(LogRecord.SEVERITY_NUMBER, severityNumber);
 
     output.serializeString(LogRecord.SEVERITY_TEXT, severityText);
@@ -109,6 +116,7 @@ protected void writeTo(Serializer output) throws IOException {
 
   private static int calculateSize(
       long timeUnixNano,
+      long observedTimeUnixNano,
       ProtoEnumInfo severityNumber,
       byte[] severityText,
       MarshalerWithSize anyValueMarshaler,
@@ -120,6 +128,8 @@ private static int calculateSize(
     int size = 0;
     size += MarshalerUtil.sizeFixed64(LogRecord.TIME_UNIX_NANO, timeUnixNano);
 
+    size += MarshalerUtil.sizeFixed64(LogRecord.OBSERVED_TIME_UNIX_NANO, observedTimeUnixNano);
+
     size += MarshalerUtil.sizeEnum(LogRecord.SEVERITY_NUMBER, severityNumber);
 
     size += MarshalerUtil.sizeBytes(LogRecord.SEVERITY_TEXT, severityText);
diff --git a/exporters/otlp/common/src/test/java/io/opentelemetry/exporter/internal/otlp/logs/LogsRequestMarshalerTest.java b/exporters/otlp/common/src/test/java/io/opentelemetry/exporter/internal/otlp/logs/LogsRequestMarshalerTest.java
index d7c29063851..306cfe1ea14 100644
--- a/exporters/otlp/common/src/test/java/io/opentelemetry/exporter/internal/otlp/logs/LogsRequestMarshalerTest.java
+++ b/exporters/otlp/common/src/test/java/io/opentelemetry/exporter/internal/otlp/logs/LogsRequestMarshalerTest.java
@@ -71,6 +71,7 @@ void toProtoResourceLogs() {
                     .setAttributes(Attributes.of(AttributeKey.booleanKey("key"), true))
                     .setTotalAttributeCount(2)
                     .setTimestamp(12345, TimeUnit.NANOSECONDS)
+                    .setObservedTimestamp(6789, TimeUnit.NANOSECONDS)
                     .build()));
 
     assertThat(resourceLogsMarshalers).hasSize(1);
@@ -114,6 +115,7 @@ void toProtoLogRecord() {
                     .setAttributes(Attributes.of(AttributeKey.booleanKey("key"), true))
                     .setTotalAttributeCount(2)
                     .setTimestamp(12345, TimeUnit.NANOSECONDS)
+                    .setObservedTimestamp(6789, TimeUnit.NANOSECONDS)
                     .build()));
 
     assertThat(logRecord.getTraceId().toByteArray()).isEqualTo(TRACE_ID_BYTES);
@@ -128,6 +130,7 @@ void toProtoLogRecord() {
                 .build());
     assertThat(logRecord.getDroppedAttributesCount()).isEqualTo(1);
     assertThat(logRecord.getTimeUnixNano()).isEqualTo(12345);
+    assertThat(logRecord.getObservedTimeUnixNano()).isEqualTo(6789);
   }
 
   @Test
@@ -142,6 +145,7 @@ void toProtoLogRecord_MinimalFields() {
                     .setInstrumentationScopeInfo(
                         InstrumentationScopeInfo.builder("instrumentation").setVersion("1").build())
                     .setTimestamp(12345, TimeUnit.NANOSECONDS)
+                    .setObservedTimestamp(6789, TimeUnit.NANOSECONDS)
                     .build()));
 
     assertThat(logRecord.getTraceId()).isEmpty();
@@ -153,6 +157,7 @@ void toProtoLogRecord_MinimalFields() {
     assertThat(logRecord.getAttributesList()).isEmpty();
     assertThat(logRecord.getDroppedAttributesCount()).isZero();
     assertThat(logRecord.getTimeUnixNano()).isEqualTo(12345);
+    assertThat(logRecord.getObservedTimeUnixNano()).isEqualTo(6789);
   }
 
   @SuppressWarnings("unchecked")