diff --git a/experimental/CHANGELOG.md b/experimental/CHANGELOG.md
index 4ce74a27093..a1efc184454 100644
--- a/experimental/CHANGELOG.md
+++ b/experimental/CHANGELOG.md
@@ -11,6 +11,7 @@ All notable changes to experimental packages in this project will be documented
 ### :rocket: (Enhancement)
 
 * feat(otlp-grpc-exporters): add support for UDS endpoints. [#3853](https://github.com/open-telemetry/opentelemetry-js/pull/3853) @llc1123
+* feat(otlp-exporters): bump otlp proto to 0.20.0 [#3932](https://github.com/open-telemetry/opentelemetry-js/pull/3932) @pichlermarc
 
 ### :bug: (Bug Fix)
 
diff --git a/experimental/packages/otlp-grpc-exporter-base/protos b/experimental/packages/otlp-grpc-exporter-base/protos
index c5c8b280125..1608f92cf08 160000
--- a/experimental/packages/otlp-grpc-exporter-base/protos
+++ b/experimental/packages/otlp-grpc-exporter-base/protos
@@ -1 +1 @@
-Subproject commit c5c8b28012583fda55b0cb16f73a820722171d49
+Subproject commit 1608f92cf08119f9aec237c910b200d1317ec696
diff --git a/experimental/packages/otlp-grpc-exporter-base/src/LogsExportServiceClient.ts b/experimental/packages/otlp-grpc-exporter-base/src/LogsExportServiceClient.ts
index 148fca31a15..b867743cea7 100644
--- a/experimental/packages/otlp-grpc-exporter-base/src/LogsExportServiceClient.ts
+++ b/experimental/packages/otlp-grpc-exporter-base/src/LogsExportServiceClient.ts
@@ -16,9 +16,11 @@
 
 import * as root from './generated/root';
 import * as grpc from '@grpc/grpc-js';
-import { IExportLogsServiceRequest } from '@opentelemetry/otlp-transformer';
+import {
+  IExportLogsServiceRequest,
+  IExportLogsServiceResponse,
+} from '@opentelemetry/otlp-transformer';
 import { ExportType } from './internal-types';
-import IExportLogsServiceResponse = root.opentelemetry.proto.collector.logs.v1.IExportLogsServiceResponse;
 
 const responseType = root.opentelemetry.proto.collector.logs.v1
   .ExportLogsServiceResponse as ExportType<IExportLogsServiceResponse>;
diff --git a/experimental/packages/otlp-grpc-exporter-base/src/MetricsExportServiceClient.ts b/experimental/packages/otlp-grpc-exporter-base/src/MetricsExportServiceClient.ts
index 9a791ca2f3f..7f81be6087d 100644
--- a/experimental/packages/otlp-grpc-exporter-base/src/MetricsExportServiceClient.ts
+++ b/experimental/packages/otlp-grpc-exporter-base/src/MetricsExportServiceClient.ts
@@ -16,9 +16,11 @@
 
 import * as root from './generated/root';
 import * as grpc from '@grpc/grpc-js';
-import { IExportMetricsServiceRequest } from '@opentelemetry/otlp-transformer';
+import {
+  IExportMetricsServiceRequest,
+  IExportMetricsServiceResponse,
+} from '@opentelemetry/otlp-transformer';
 import { ExportType } from './internal-types';
-import IExportMetricsServiceResponse = root.opentelemetry.proto.collector.metrics.v1.IExportMetricsServiceResponse;
 
 const responseType = root.opentelemetry.proto.collector.metrics.v1
   .ExportMetricsServiceResponse as ExportType<IExportMetricsServiceResponse>;
diff --git a/experimental/packages/otlp-grpc-exporter-base/src/TraceExportServiceClient.ts b/experimental/packages/otlp-grpc-exporter-base/src/TraceExportServiceClient.ts
index 6a150a24b11..d332e4f4daa 100644
--- a/experimental/packages/otlp-grpc-exporter-base/src/TraceExportServiceClient.ts
+++ b/experimental/packages/otlp-grpc-exporter-base/src/TraceExportServiceClient.ts
@@ -16,9 +16,11 @@
 
 import * as root from './generated/root';
 import * as grpc from '@grpc/grpc-js';
-import { IExportTraceServiceRequest } from '@opentelemetry/otlp-transformer';
+import {
+  IExportTraceServiceRequest,
+  IExportTraceServiceResponse,
+} from '@opentelemetry/otlp-transformer';
 import { ExportType } from './internal-types';
-import IExportTraceServiceResponse = root.opentelemetry.proto.collector.trace.v1.IExportTraceServiceResponse;
 
 const responseType = root.opentelemetry.proto.collector.trace.v1
   .ExportTraceServiceResponse as ExportType<IExportTraceServiceResponse>;
diff --git a/experimental/packages/otlp-proto-exporter-base/protos b/experimental/packages/otlp-proto-exporter-base/protos
index c5c8b280125..1608f92cf08 160000
--- a/experimental/packages/otlp-proto-exporter-base/protos
+++ b/experimental/packages/otlp-proto-exporter-base/protos
@@ -1 +1 @@
-Subproject commit c5c8b28012583fda55b0cb16f73a820722171d49
+Subproject commit 1608f92cf08119f9aec237c910b200d1317ec696
diff --git a/experimental/packages/otlp-transformer/src/common/types.ts b/experimental/packages/otlp-transformer/src/common/types.ts
index 8b30231e743..159a595ba94 100644
--- a/experimental/packages/otlp-transformer/src/common/types.ts
+++ b/experimental/packages/otlp-transformer/src/common/types.ts
@@ -21,6 +21,12 @@ export interface IInstrumentationScope {
 
   /** InstrumentationScope version */
   version?: string;
+
+  /** InstrumentationScope attributes */
+  attributes?: IKeyValue[];
+
+  /** InstrumentationScope droppedAttributesCount */
+  droppedAttributesCount?: number;
 }
 
 /** Properties of a KeyValue. */
diff --git a/experimental/packages/otlp-transformer/src/logs/types.ts b/experimental/packages/otlp-transformer/src/logs/types.ts
index 3d3e610bc74..05709af6f52 100644
--- a/experimental/packages/otlp-transformer/src/logs/types.ts
+++ b/experimental/packages/otlp-transformer/src/logs/types.ts
@@ -27,6 +27,19 @@ export interface IExportLogsServiceRequest {
   resourceLogs?: IResourceLogs[];
 }
 
+export interface IExportLogsServiceResponse {
+  /** ExportLogsServiceResponse partialSuccess */
+  partialSuccess?: IExportLogsPartialSuccess;
+}
+
+export interface IExportLogsPartialSuccess {
+  /** ExportLogsPartialSuccess rejectedLogRecords */
+  rejectedLogRecords?: number;
+
+  /** ExportLogsPartialSuccess errorMessage */
+  errorMessage?: string;
+}
+
 /** Properties of a ResourceLogs. */
 export interface IResourceLogs {
   /** ResourceLogs resource */
diff --git a/experimental/packages/otlp-transformer/src/metrics/types.ts b/experimental/packages/otlp-transformer/src/metrics/types.ts
index 6db9c17a9be..2728ab1abae 100644
--- a/experimental/packages/otlp-transformer/src/metrics/types.ts
+++ b/experimental/packages/otlp-transformer/src/metrics/types.ts
@@ -22,6 +22,19 @@ export interface IExportMetricsServiceRequest {
   resourceMetrics: IResourceMetrics[];
 }
 
+export interface IExportMetricsServiceResponse {
+  /** ExportMetricsServiceResponse partialSuccess */
+  partialSuccess?: IExportMetricsPartialSuccess;
+}
+
+export interface IExportMetricsPartialSuccess {
+  /** ExportMetricsPartialSuccess rejectedDataPoints */
+  rejectedDataPoints?: number;
+
+  /** ExportMetricsPartialSuccess errorMessage */
+  errorMessage?: string;
+}
+
 /** Properties of a ResourceMetrics. */
 export interface IResourceMetrics {
   /** ResourceMetrics resource */
diff --git a/experimental/packages/otlp-transformer/src/trace/types.ts b/experimental/packages/otlp-transformer/src/trace/types.ts
index 08e52c7a06f..a6cfb82ad7a 100644
--- a/experimental/packages/otlp-transformer/src/trace/types.ts
+++ b/experimental/packages/otlp-transformer/src/trace/types.ts
@@ -23,6 +23,19 @@ export interface IExportTraceServiceRequest {
   resourceSpans?: IResourceSpans[];
 }
 
+export interface IExportTraceServiceResponse {
+  /** ExportTraceServiceResponse partialSuccess */
+  partialSuccess?: IExportTracePartialSuccess;
+}
+
+export interface IExportTracePartialSuccess {
+  /** ExportLogsServiceResponse rejectedLogRecords */
+  rejectedSpans?: number;
+
+  /** ExportLogsServiceResponse errorMessage */
+  errorMessage?: string;
+}
+
 /** Properties of a ResourceSpans. */
 export interface IResourceSpans {
   /** ResourceSpans resource */