fixes

Author: juliuskoval

src/OpenTelemetry.Api/.publicApi/Experimental/PublicAPI.Unshipped.txt

@@ -29,6 +29,8 @@
 [OTEL1001]OpenTelemetry.Logs.LogRecordData.LogRecordData() -> void
 [OTEL1001]OpenTelemetry.Logs.LogRecordData.LogRecordData(in System.Diagnostics.ActivityContext activityContext) -> void
 [OTEL1001]OpenTelemetry.Logs.LogRecordData.LogRecordData(System.Diagnostics.Activity? activity) -> void
+[OTEL1001]OpenTelemetry.Logs.LogRecordData.ObservedTimestamp.get -> System.DateTime
+[OTEL1001]OpenTelemetry.Logs.LogRecordData.ObservedTimestamp.set -> void
 [OTEL1001]OpenTelemetry.Logs.LogRecordData.Severity.get -> OpenTelemetry.Logs.LogRecordSeverity?
 [OTEL1001]OpenTelemetry.Logs.LogRecordData.Severity.set -> void
 [OTEL1001]OpenTelemetry.Logs.LogRecordData.SeverityText.get -> string?
@@ -73,5 +75,3 @@
 [OTEL1001]static OpenTelemetry.Logs.LogRecordAttributeList.CreateFromEnumerable(System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<string!, object?>>! attributes) -> OpenTelemetry.Logs.LogRecordAttributeList
 [OTEL1001]static OpenTelemetry.Logs.LogRecordSeverityExtensions.ToShortName(this OpenTelemetry.Logs.LogRecordSeverity logRecordSeverity) -> string!
 [OTEL1001]virtual OpenTelemetry.Logs.LoggerProvider.TryCreateLogger(string? name, out OpenTelemetry.Logs.Logger? logger) -> bool
-[OTEL1001]OpenTelemetry.Logs.LogRecordData.ObservedTimestamp.get -> System.DateTime
-[OTEL1001]OpenTelemetry.Logs.LogRecordData.ObservedTimestamp.set -> void

src/OpenTelemetry.Api/CHANGELOG.md

@@ -6,7 +6,8 @@ Notes](../../RELEASENOTES.md).
 
 ## Unreleased
 
-* Added `ObservedTimestamp` property to `LogRecordData`.
+* Added `ObservedTimestamp` property to `LogRecordData`. Note that `LogRecordData` 
+  is only public in pre-release versions of the package.
   ([#6979](https://github.com/open-telemetry/opentelemetry-dotnet/pull/6979))
 
 ## 1.15.1

src/OpenTelemetry.Exporter.OpenTelemetryProtocol/CHANGELOG.md

@@ -7,6 +7,11 @@ Notes](../../RELEASENOTES.md).
 
 ## Unreleased
 
+* `observed_time_unix_nano` will no longer always be identical to `time_unix_nano`
+  when using the logs bridge API. By default, it will instead be set to the actual
+  observed time of the log record.
+  ([#6979](https://github.com/open-telemetry/opentelemetry-dotnet/pull/6979))
+
 ## 1.15.1
 
 Released 2026-Mar-27