diff --git a/scripts/vendor_otlp_proto_common.sh b/scripts/vendor_otlp_proto_common.sh
index 24adf7c..2a53f37 100755
--- a/scripts/vendor_otlp_proto_common.sh
+++ b/scripts/vendor_otlp_proto_common.sh
@@ -50,5 +50,9 @@ fi
 #   opentelemetry.proto.*_pb2 to snowflake.telemetry._internal.opentelemetry.proto.*_marshaler
 
 find opentelemetry/exporter -type f -name "*.py" -exec $SED_CMD 's/opentelemetry.exporter/snowflake.telemetry._internal.opentelemetry.exporter/g' {} +
-find opentelemetry/exporter -type f -name "*.py" -exec $SED_CMD -i 's/opentelemetry\.proto\(.*\)_pb2/snowflake.telemetry._internal.opentelemetry.proto\1_marshaler/g' {} +
+find opentelemetry/exporter -type f -name "*.py" -exec $SED_CMD 's/opentelemetry\.proto\(.*\)_pb2/snowflake.telemetry._internal.opentelemetry.proto\1_marshaler/g' {} +
 
+
+# Add a notice to the top of every file in compliance with Apache 2.0 to indicate that the file has been modified
+# https://www.apache.org/licenses/LICENSE-2.0
+find opentelemetry/exporter -type f -name "*.py" -exec $SED_CMD '14s|^|#\n# NOTICE:\n# This file has been modified from the original source code at\n#\n#     https://github.com/open-telemetry/opentelemetry-python/tree/'"$REPO_BRANCH_OR_COMMIT"'\n#\n# by Snowflake Computing Inc.\n|' {} +
diff --git a/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/__init__.py b/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/__init__.py
index dffaa32..5f47c14 100644
--- a/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/__init__.py
+++ b/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/__init__.py
@@ -11,6 +11,13 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+#
+# NOTICE:
+# This file has been modified from the original source code at
+#
+#     https://github.com/open-telemetry/opentelemetry-python/tree/v1.26.0
+#
+# by Snowflake Computing Inc.
 
 
 from snowflake.telemetry._internal.opentelemetry.exporter.otlp.proto.common.version import __version__
diff --git a/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/_internal/__init__.py b/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/_internal/__init__.py
index fe1c776..42768c7 100644
--- a/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/_internal/__init__.py
+++ b/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/_internal/__init__.py
@@ -11,6 +11,13 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+#
+# NOTICE:
+# This file has been modified from the original source code at
+#
+#     https://github.com/open-telemetry/opentelemetry-python/tree/v1.26.0
+#
+# by Snowflake Computing Inc.
 
 
 import logging
diff --git a/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/_internal/_log_encoder/__init__.py b/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/_internal/_log_encoder/__init__.py
index 916d5d6..31620c5 100644
--- a/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/_internal/_log_encoder/__init__.py
+++ b/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/_internal/_log_encoder/__init__.py
@@ -11,6 +11,13 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+#
+# NOTICE:
+# This file has been modified from the original source code at
+#
+#     https://github.com/open-telemetry/opentelemetry-python/tree/v1.26.0
+#
+# by Snowflake Computing Inc.
 from collections import defaultdict
 from typing import Sequence, List
 
diff --git a/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/_internal/metrics_encoder/__init__.py b/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/_internal/metrics_encoder/__init__.py
index 5620f17..29f8a41 100644
--- a/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/_internal/metrics_encoder/__init__.py
+++ b/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/_internal/metrics_encoder/__init__.py
@@ -11,6 +11,13 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+#
+# NOTICE:
+# This file has been modified from the original source code at
+#
+#     https://github.com/open-telemetry/opentelemetry-python/tree/v1.26.0
+#
+# by Snowflake Computing Inc.
 import logging
 
 from opentelemetry.sdk.metrics.export import (
diff --git a/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/_internal/trace_encoder/__init__.py b/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/_internal/trace_encoder/__init__.py
index 8243860..9d734eb 100644
--- a/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/_internal/trace_encoder/__init__.py
+++ b/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/_internal/trace_encoder/__init__.py
@@ -11,6 +11,13 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+#
+# NOTICE:
+# This file has been modified from the original source code at
+#
+#     https://github.com/open-telemetry/opentelemetry-python/tree/v1.26.0
+#
+# by Snowflake Computing Inc.
 
 import logging
 from collections import defaultdict
diff --git a/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/_log_encoder.py b/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/_log_encoder.py
index 4e761cd..18e9dbe 100644
--- a/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/_log_encoder.py
+++ b/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/_log_encoder.py
@@ -11,6 +11,13 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+#
+# NOTICE:
+# This file has been modified from the original source code at
+#
+#     https://github.com/open-telemetry/opentelemetry-python/tree/v1.26.0
+#
+# by Snowflake Computing Inc.
 
 
 from snowflake.telemetry._internal.opentelemetry.exporter.otlp.proto.common._internal._log_encoder import (
diff --git a/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/metrics_encoder.py b/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/metrics_encoder.py
index a8425de..f75ff36 100644
--- a/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/metrics_encoder.py
+++ b/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/metrics_encoder.py
@@ -11,6 +11,13 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+#
+# NOTICE:
+# This file has been modified from the original source code at
+#
+#     https://github.com/open-telemetry/opentelemetry-python/tree/v1.26.0
+#
+# by Snowflake Computing Inc.
 
 
 from snowflake.telemetry._internal.opentelemetry.exporter.otlp.proto.common._internal.metrics_encoder import (
diff --git a/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/trace_encoder.py b/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/trace_encoder.py
index d5896eb..694d38c 100644
--- a/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/trace_encoder.py
+++ b/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/trace_encoder.py
@@ -11,6 +11,13 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+#
+# NOTICE:
+# This file has been modified from the original source code at
+#
+#     https://github.com/open-telemetry/opentelemetry-python/tree/v1.26.0
+#
+# by Snowflake Computing Inc.
 
 
 from snowflake.telemetry._internal.opentelemetry.exporter.otlp.proto.common._internal.trace_encoder import (
diff --git a/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/version.py b/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/version.py
index 02b6cd0..b2d7216 100644
--- a/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/version.py
+++ b/src/snowflake/telemetry/_internal/opentelemetry/exporter/otlp/proto/common/version.py
@@ -11,5 +11,12 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+#
+# NOTICE:
+# This file has been modified from the original source code at
+#
+#     https://github.com/open-telemetry/opentelemetry-python/tree/v1.26.0
+#
+# by Snowflake Computing Inc.
 
 __version__ = "1.26.0"