diff --git a/.github/workflows/format-tests.yml b/.github/workflows/format-tests.yml
index d036b2f7..0bff30ab 100644
--- a/.github/workflows/format-tests.yml
+++ b/.github/workflows/format-tests.yml
@@ -27,7 +27,7 @@ jobs:
 
       - name: Build containers
         run: |
-          docker build . --tag topo-imagery --label "github_run_id=${GITHUB_RUN_ID}"
+          docker build --build-arg=GIT_HASH=test --build-arg=GIT_VERSION=test --label "github_run_id=${GITHUB_RUN_ID}" --tag topo-imagery .
 
       - name: End to end test - Aerial Imagery
         run: |
diff --git a/Dockerfile b/Dockerfile
index d514ee4e..61addb44 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -24,6 +24,11 @@ RUN /root/.local/bin/poetry bundle venv --no-ansi --no-interaction --only=main -
 
 FROM ghcr.io/osgeo/gdal:ubuntu-small-3.9.0@sha256:d1a38af532e5d9e3991c4a6bddc2f2cb52644dc30a4eb8242101e8e23c3f83f6
 
+ARG GIT_HASH
+ENV GIT_HASH=${GIT_HASH:?'GIT_HASH is mandatory'}
+ARG GIT_VERSION
+ENV GIT_VERSION=${GIT_VERSION:?'GIT_VERSION is mandatory'}
+
 ENV TZ=Etc/UTC
 
 # Copy just the bundle from the first stage
diff --git a/README.md b/README.md
index ee676671..0a362831 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@ The scripts have been implemented to be run inside the Docker container only. Th
 - Build the `Docker` image:
 
 ```bash
-docker build . -t topo-imagery
+docker build --build-arg=GIT_HASH=dev --build-arg=GIT_VERSION=dev --tag=topo-imagery .
 ```
 
 - Running `standardising_validate.py` script
diff --git a/scripts/stac/imagery/create_stac.py b/scripts/stac/imagery/create_stac.py
index 1948d975..0851fc82 100644
--- a/scripts/stac/imagery/create_stac.py
+++ b/scripts/stac/imagery/create_stac.py
@@ -18,6 +18,7 @@ def create_item(
     start_datetime: str,
     end_datetime: str,
     collection_id: str,
+    gdal_version: str,
     gdalinfo_result: GdalInfo | None = None,
     derived_from: list[str] | None = None,
 ) -> ImageryItem:
@@ -28,6 +29,7 @@ def create_item(
         start_datetime: start date of the survey
         end_datetime: end date of the survey
         collection_id: collection id to link to the Item
+        gdal_version: GDAL version
         gdalinfo_result: result of the gdalinfo command. Defaults to None.
         derived_from: list of STAC Items from where this Item is derived. Defaults to None.
 
@@ -41,7 +43,7 @@ def create_item(
 
     geometry, bbox = get_extents(gdalinfo_result)
 
-    item = ImageryItem(id_, file, utc_now)
+    item = ImageryItem(id_, file, gdal_version, utc_now)
 
     if derived_from is not None:
         for derived in derived_from:
diff --git a/scripts/stac/imagery/item.py b/scripts/stac/imagery/item.py
index 0e3e78af..943dfdd1 100644
--- a/scripts/stac/imagery/item.py
+++ b/scripts/stac/imagery/item.py
@@ -1,6 +1,7 @@
 import os
 from collections.abc import Callable
 from datetime import datetime
+from os import environ
 from typing import Any
 
 from scripts.datetimes import format_rfc_3339_datetime_string
@@ -16,7 +17,7 @@
 class ImageryItem:
     stac: dict[str, Any]
 
-    def __init__(self, id_: str, file: str, now: Callable[[], datetime]) -> None:
+    def __init__(self, id_: str, file: str, gdal_version: str, now: Callable[[], datetime]) -> None:
         file_content = fs.read(file)
         file_modified_datetime = format_rfc_3339_datetime_string(modified(file))
         now_string = format_rfc_3339_datetime_string(now())
@@ -34,8 +35,17 @@ def __init__(self, id_: str, file: str, now: Callable[[], datetime]) -> None:
                     "updated": file_modified_datetime,
                 }
             },
-            "stac_extensions": [StacExtensions.file.value],
-            "properties": {"created": now_string, "updated": now_string},
+            "stac_extensions": [StacExtensions.file.value, StacExtensions.processing.value],
+            "properties": {
+                "created": now_string,
+                "updated": now_string,
+                "processing:datetime": now_string,
+                "processing:software": {
+                    "gdal": gdal_version,
+                    "linz/topo-imagery": f"https://github.com/linz/topo-imagery/commit/{environ['GIT_HASH']}",
+                },
+                "processing:version": environ["GIT_VERSION"],
+            },
         }
 
     def update_datetime(self, start_datetime: str, end_datetime: str) -> None:
diff --git a/scripts/stac/imagery/tests/collection_test.py b/scripts/stac/imagery/tests/collection_test.py
index de5634a2..0cf0bae8 100644
--- a/scripts/stac/imagery/tests/collection_test.py
+++ b/scripts/stac/imagery/tests/collection_test.py
@@ -5,6 +5,7 @@
 from datetime import datetime, timezone
 from shutil import rmtree
 from tempfile import mkdtemp
+from unittest.mock import patch
 
 import pytest
 import shapely.geometry
@@ -133,7 +134,8 @@ def test_add_item(metadata: CollectionMetadata, subtests: SubTests) -> None:
     item_file_path = "./scripts/tests/data/empty.tiff"
     modified_datetime = datetime(2001, 2, 3, hour=4, minute=5, second=6, tzinfo=timezone.utc)
     os.utime(item_file_path, times=(any_epoch_datetime().timestamp(), modified_datetime.timestamp()))
-    item = ImageryItem("BR34_5000_0304", item_file_path, now_function)
+    with patch.dict(os.environ, {"GIT_HASH": "any Git hash", "GIT_VERSION": "any Git version"}):
+        item = ImageryItem("BR34_5000_0304", item_file_path, "any GDAL version", now_function)
     geometry = {
         "type": "Polygon",
         "coordinates": [[1799667.5, 5815977.0], [1800422.5, 5815977.0], [1800422.5, 5814986.0], [1799667.5, 5814986.0]],
diff --git a/scripts/stac/imagery/tests/create_stac_test.py b/scripts/stac/imagery/tests/create_stac_test.py
index a99c4b60..da74eaab 100644
--- a/scripts/stac/imagery/tests/create_stac_test.py
+++ b/scripts/stac/imagery/tests/create_stac_test.py
@@ -1,6 +1,8 @@
 import json
+from os import environ
 from pathlib import Path
 from typing import cast
+from unittest.mock import patch
 
 from scripts.gdal.gdalinfo import GdalInfo
 from scripts.stac.imagery.create_stac import create_item
@@ -18,7 +20,16 @@ def test_create_item_with_derived_from(tmp_path: Path) -> None:
         GdalInfo, {"wgs84Extent": {"type": "Polygon", "coordinates": [[[0, 1], [1, 1], [1, 0], [0, 0]]]}}
     )
 
-    item = create_item("./scripts/tests/data/empty.tiff", "", "", "abc123", fake_gdal_info, [derived_from_path.as_posix()])
+    with patch.dict(environ, {"GIT_HASH": "any Git hash", "GIT_VERSION": "any Git version"}):
+        item = create_item(
+            "./scripts/tests/data/empty.tiff",
+            "",
+            "",
+            "abc123",
+            "any GDAL version",
+            fake_gdal_info,
+            [derived_from_path.as_posix()],
+        )
 
     assert {
         "href": derived_from_path.as_posix(),
@@ -47,14 +58,16 @@ def test_create_item_with_derived_from_datetimes(tmp_path: Path) -> None:
         GdalInfo, {"wgs84Extent": {"type": "Polygon", "coordinates": [[[0, 1], [1, 1], [1, 0], [0, 0]]]}}
     )
 
-    item = create_item(
-        "./scripts/tests/data/empty.tiff",
-        "",
-        "",
-        "abc123",
-        fake_gdal_info,
-        [derived_from_path_a.as_posix(), derived_from_path_b.as_posix()],
-    )
+    with patch.dict(environ, {"GIT_HASH": "any Git hash", "GIT_VERSION": "any Git version"}):
+        item = create_item(
+            "./scripts/tests/data/empty.tiff",
+            "",
+            "",
+            "abc123",
+            "any GDAL version",
+            fake_gdal_info,
+            [derived_from_path_a.as_posix(), derived_from_path_b.as_posix()],
+        )
 
     assert item.stac["properties"]["start_datetime"] == "1998-02-12T11:00:00Z"
     assert item.stac["properties"]["end_datetime"] == "2024-09-02T12:00:00Z"
diff --git a/scripts/stac/imagery/tests/item_test.py b/scripts/stac/imagery/tests/item_test.py
index 5ec7a65f..5ff24929 100644
--- a/scripts/stac/imagery/tests/item_test.py
+++ b/scripts/stac/imagery/tests/item_test.py
@@ -1,4 +1,6 @@
-from datetime import datetime
+from datetime import datetime, timezone
+from os import environ
+from unittest.mock import patch
 
 from pytest_mock import MockerFixture
 from pytest_subtests import SubTests
@@ -7,6 +9,7 @@
 from scripts.stac.imagery.collection import ImageryCollection
 from scripts.stac.imagery.item import ImageryItem
 from scripts.stac.imagery.metadata_constants import CollectionMetadata
+from scripts.stac.util.stac_extensions import StacExtensions
 from scripts.tests.datetimes_test import any_epoch_datetime
 
 
@@ -24,7 +27,14 @@ def test_imagery_stac_item(mocker: MockerFixture, subtests: SubTests) -> None:
     start_datetime = "2021-01-27T00:00:00Z"
     end_datetime = "2021-01-27T00:00:00Z"
 
-    item = ImageryItem(id_, path, any_epoch_datetime)
+    def fake_now() -> datetime:
+        return datetime(1979, 1, 1, tzinfo=timezone.utc)
+
+    git_hash = "any Git hash"
+    git_version = "any Git version string"
+    gdal_version_string = "any GDAL version string"
+    with patch.dict(environ, {"GIT_HASH": git_hash, "GIT_VERSION": git_version}):
+        item = ImageryItem(id_, path, gdal_version_string, fake_now)
     item.update_spatial(geometry, bbox)
     item.update_datetime(start_datetime, end_datetime)
     # checks
@@ -40,6 +50,26 @@ def test_imagery_stac_item(mocker: MockerFixture, subtests: SubTests) -> None:
     with subtests.test():
         assert item.stac["properties"]["datetime"] is None
 
+    with subtests.test():
+        assert (
+            item.stac["properties"]["created"]
+            == item.stac["properties"]["updated"]
+            == item.stac["properties"]["processing:datetime"]
+            == "1979-01-01T00:00:00Z"
+        )
+
+    with subtests.test():
+        assert item.stac["properties"]["processing:version"] == git_version
+
+    with subtests.test():
+        assert item.stac["properties"]["processing:software"] == {
+            "gdal": gdal_version_string,
+            "linz/topo-imagery": f"https://github.com/linz/topo-imagery/commit/{git_hash}",
+        }
+
+    with subtests.test():
+        assert item.stac["stac_extensions"] == [StacExtensions.file.value, StacExtensions.processing.value]
+
     with subtests.test():
         assert item.stac["geometry"]["coordinates"] == geometry["coordinates"]
 
@@ -78,7 +108,8 @@ def test_imagery_add_collection(mocker: MockerFixture, subtests: SubTests) -> No
     path = "./scripts/tests/data/empty.tiff"
     id_ = get_file_name_from_path(path)
     mocker.patch("scripts.files.fs.read", return_value=b"")
-    item = ImageryItem(id_, path, any_epoch_datetime)
+    with patch.dict(environ, {"GIT_HASH": "any Git hash", "GIT_VERSION": "any Git version"}):
+        item = ImageryItem(id_, path, "any GDAL version", any_epoch_datetime)
 
     item.add_collection(collection.stac["id"])
 
diff --git a/scripts/stac/util/stac_extensions.py b/scripts/stac/util/stac_extensions.py
index 4567f0c6..fa6ba459 100644
--- a/scripts/stac/util/stac_extensions.py
+++ b/scripts/stac/util/stac_extensions.py
@@ -3,3 +3,4 @@
 
 class StacExtensions(str, Enum):
     file = "https://stac-extensions.github.io/file/v2.0.0/schema.json"
+    processing = "https://stac-extensions.github.io/processing/v1.2.0/schema.json"
diff --git a/scripts/standardise_validate.py b/scripts/standardise_validate.py
index 40acbc6d..d62f1891 100644
--- a/scripts/standardise_validate.py
+++ b/scripts/standardise_validate.py
@@ -8,7 +8,7 @@
 from scripts.datetimes import format_rfc_3339_nz_midnight_datetime_string
 from scripts.files.files_helper import SUFFIX_JSON, ContentType
 from scripts.files.fs import exists, write
-from scripts.gdal.gdal_helper import get_srs, get_vfs_path
+from scripts.gdal.gdal_helper import get_gdal_version, get_srs, get_vfs_path
 from scripts.json_codec import dict_to_json_bytes
 from scripts.stac.imagery.create_stac import create_item
 from scripts.standardising import run_standardising
@@ -84,6 +84,8 @@ def main() -> None:
     if is_argo():
         concurrency = 4
 
+    gdal_version = get_gdal_version()
+
     tiff_files = run_standardising(
         tile_files,
         arguments.preset,
@@ -93,6 +95,7 @@ def main() -> None:
         arguments.target_epsg,
         arguments.gsd,
         arguments.create_footprints,
+        gdal_version,
         arguments.target,
     )
 
@@ -137,6 +140,7 @@ def main() -> None:
                 start_datetime,
                 end_datetime,
                 arguments.collection_id,
+                gdal_version,
                 file.get_gdalinfo(),
                 file.get_derived_from_paths(),
             )
diff --git a/scripts/standardising.py b/scripts/standardising.py
index b009f21c..139a8270 100644
--- a/scripts/standardising.py
+++ b/scripts/standardising.py
@@ -12,7 +12,7 @@
 from scripts.files.files_helper import SUFFIX_FOOTPRINT, ContentType, is_tiff
 from scripts.files.fs import exists, read, write, write_all, write_sidecars
 from scripts.gdal.gdal_bands import get_gdal_band_offset
-from scripts.gdal.gdal_helper import EpsgNumber, gdal_info, get_gdal_version, run_gdal
+from scripts.gdal.gdal_helper import EpsgNumber, gdal_info, run_gdal
 from scripts.gdal.gdal_preset import (
     get_alpha_command,
     get_build_vrt_command,
@@ -34,6 +34,7 @@ def run_standardising(
     target_epsg: str,
     gsd: str,
     create_footprints: bool,
+    gdal_version: str,
     target_output: str = "/tmp/",
 ) -> list[FileTiff]:
     """Run `standardising()` in parallel (`concurrency`).
@@ -46,6 +47,7 @@ def run_standardising(
         source_epsg: EPSG code of the source file
         target_epsg: EPSG code of reprojection
         gsd: Ground Sample Distance in meters
+        gdal_version: version of GDAL used for standardising
         target_output: output directory path. Defaults to "/tmp/"
 
     Returns:
@@ -54,7 +56,6 @@ def run_standardising(
     # pylint: disable-msg=too-many-arguments
     start_time = time_in_ms()
 
-    gdal_version = get_gdal_version()
     get_log().info("standardising_start", gdalVersion=gdal_version, fileCount=len(todo))
 
     with Pool(concurrency) as p:
diff --git a/scripts/tests/collection_from_items_test.py b/scripts/tests/collection_from_items_test.py
index 38b33c68..6ba4bccd 100644
--- a/scripts/tests/collection_from_items_test.py
+++ b/scripts/tests/collection_from_items_test.py
@@ -1,5 +1,7 @@
 from collections.abc import Generator
 from datetime import datetime
+from os import environ
+from unittest.mock import patch
 
 import pytest
 from boto3 import client, resource
@@ -20,7 +22,8 @@
 @pytest.fixture(name="item", autouse=True)
 def setup() -> Generator[ImageryItem, None, None]:
     # Create mocked STAC Item
-    item = ImageryItem("123", "./scripts/tests/data/empty.tiff", utc_now)
+    with patch.dict(environ, {"GIT_HASH": "any Git hash", "GIT_VERSION": "any Git version"}):
+        item = ImageryItem("123", "./scripts/tests/data/empty.tiff", "any GDAL version", utc_now)
     geometry = {
         "type": "Polygon",
         "coordinates": [[1799667.5, 5815977.0], [1800422.5, 5815977.0], [1800422.5, 5814986.0], [1799667.5, 5814986.0]],