diff --git a/internal/attestation/measurements/measurements.go b/internal/attestation/measurements/measurements.go
index 7f5655146..a5bde8951 100644
--- a/internal/attestation/measurements/measurements.go
+++ b/internal/attestation/measurements/measurements.go
@@ -78,6 +78,42 @@ type ImageMeasurementsV2Entry struct {
 	Measurements       M                      `json:"measurements" yaml:"measurements"`
 }
 
+// MergeImageMeasurementsV2 combines the image measurement entries from multiple sources into a single
+// ImageMeasurementsV2 object.
+func MergeImageMeasurementsV2(measurements ...ImageMeasurementsV2) (ImageMeasurementsV2, error) {
+	if len(measurements) == 0 {
+		return ImageMeasurementsV2{}, errors.New("no measurement objects specified")
+	}
+	if len(measurements) == 1 {
+		return measurements[0], nil
+	}
+	out := ImageMeasurementsV2{
+		Version: measurements[0].Version,
+		Ref:     measurements[0].Ref,
+		Stream:  measurements[0].Stream,
+		List:    []ImageMeasurementsV2Entry{},
+	}
+	for _, m := range measurements {
+		if m.Version != out.Version {
+			return ImageMeasurementsV2{}, errors.New("version mismatch")
+		}
+		if m.Ref != out.Ref {
+			return ImageMeasurementsV2{}, errors.New("ref mismatch")
+		}
+		if m.Stream != out.Stream {
+			return ImageMeasurementsV2{}, errors.New("stream mismatch")
+		}
+		out.List = append(out.List, m.List...)
+	}
+	sort.SliceStable(out.List, func(i, j int) bool {
+		if out.List[i].CSP != out.List[j].CSP {
+			return out.List[i].CSP < out.List[j].CSP
+		}
+		return out.List[i].AttestationVariant < out.List[j].AttestationVariant
+	})
+	return out, nil
+}
+
 // MarshalYAML returns the YAML encoding of m.
 func (m M) MarshalYAML() (any, error) {
 	// cast to prevent infinite recursion
diff --git a/internal/attestation/measurements/measurements_test.go b/internal/attestation/measurements/measurements_test.go
index 1f1127c45..3a8d9e741 100644
--- a/internal/attestation/measurements/measurements_test.go
+++ b/internal/attestation/measurements/measurements_test.go
@@ -746,3 +746,200 @@ func TestEqualTo(t *testing.T) {
 		})
 	}
 }
+
+func TestMergeImageMeasurementsV2(t *testing.T) {
+	testCases := map[string]struct {
+		measurements     []ImageMeasurementsV2
+		wantMeasurements ImageMeasurementsV2
+		wantErr          bool
+	}{
+		"only one element": {
+			measurements: []ImageMeasurementsV2{
+				{
+					Ref:     "test-ref",
+					Stream:  "nightly",
+					Version: "v1.0.0",
+					List: []ImageMeasurementsV2Entry{
+						{
+							CSP:                cloudprovider.AWS,
+							AttestationVariant: "aws-nitro-tpm",
+							Measurements: M{
+								0: WithAllBytes(0x00, Enforce, PCRMeasurementLength),
+							},
+						},
+					},
+				},
+			},
+			wantMeasurements: ImageMeasurementsV2{
+				Ref:     "test-ref",
+				Stream:  "nightly",
+				Version: "v1.0.0",
+				List: []ImageMeasurementsV2Entry{
+					{
+						CSP:                cloudprovider.AWS,
+						AttestationVariant: "aws-nitro-tpm",
+						Measurements: M{
+							0: WithAllBytes(0x00, Enforce, PCRMeasurementLength),
+						},
+					},
+				},
+			},
+		},
+		"valid measurements": {
+			measurements: []ImageMeasurementsV2{
+				{
+					Ref:     "test-ref",
+					Stream:  "nightly",
+					Version: "v1.0.0",
+					List: []ImageMeasurementsV2Entry{
+						{
+							CSP:                cloudprovider.AWS,
+							AttestationVariant: "aws-nitro-tpm",
+							Measurements: M{
+								0: WithAllBytes(0x00, Enforce, PCRMeasurementLength),
+							},
+						},
+					},
+				},
+				{
+					Ref:     "test-ref",
+					Stream:  "nightly",
+					Version: "v1.0.0",
+					List: []ImageMeasurementsV2Entry{
+						{
+							CSP:                cloudprovider.GCP,
+							AttestationVariant: "gcp-sev-es",
+							Measurements: M{
+								1: WithAllBytes(0x11, Enforce, PCRMeasurementLength),
+							},
+						},
+					},
+				},
+			},
+			wantMeasurements: ImageMeasurementsV2{
+				Ref:     "test-ref",
+				Stream:  "nightly",
+				Version: "v1.0.0",
+				List: []ImageMeasurementsV2Entry{
+					{
+						CSP:                cloudprovider.AWS,
+						AttestationVariant: "aws-nitro-tpm",
+						Measurements: M{
+							0: WithAllBytes(0x00, Enforce, PCRMeasurementLength),
+						},
+					},
+					{
+						CSP:                cloudprovider.GCP,
+						AttestationVariant: "gcp-sev-es",
+						Measurements: M{
+							1: WithAllBytes(0x11, Enforce, PCRMeasurementLength),
+						},
+					},
+				},
+			},
+		},
+		"sorting": {
+			measurements: []ImageMeasurementsV2{
+				{
+					Ref:     "test-ref",
+					Stream:  "nightly",
+					Version: "v1.0.0",
+					List: []ImageMeasurementsV2Entry{
+						{
+							CSP:                cloudprovider.GCP,
+							AttestationVariant: "gcp-sev-es",
+							Measurements: M{
+								1: WithAllBytes(0x11, Enforce, PCRMeasurementLength),
+							},
+						},
+					},
+				},
+				{
+					Ref:     "test-ref",
+					Stream:  "nightly",
+					Version: "v1.0.0",
+					List: []ImageMeasurementsV2Entry{
+						{
+							CSP:                cloudprovider.AWS,
+							AttestationVariant: "aws-nitro-tpm",
+							Measurements: M{
+								0: WithAllBytes(0x00, Enforce, PCRMeasurementLength),
+							},
+						},
+					},
+				},
+			},
+			wantMeasurements: ImageMeasurementsV2{
+				Ref:     "test-ref",
+				Stream:  "nightly",
+				Version: "v1.0.0",
+				List: []ImageMeasurementsV2Entry{
+					{
+						CSP:                cloudprovider.AWS,
+						AttestationVariant: "aws-nitro-tpm",
+						Measurements: M{
+							0: WithAllBytes(0x00, Enforce, PCRMeasurementLength),
+						},
+					},
+					{
+						CSP:                cloudprovider.GCP,
+						AttestationVariant: "gcp-sev-es",
+						Measurements: M{
+							1: WithAllBytes(0x11, Enforce, PCRMeasurementLength),
+						},
+					},
+				},
+			},
+		},
+		"mismatch in base info": {
+			measurements: []ImageMeasurementsV2{
+				{
+					Ref:     "test-ref",
+					Stream:  "nightly",
+					Version: "v1.0.0",
+					List: []ImageMeasurementsV2Entry{
+						{
+							CSP:                cloudprovider.AWS,
+							AttestationVariant: "aws-nitro-tpm",
+							Measurements: M{
+								0: WithAllBytes(0x00, Enforce, PCRMeasurementLength),
+							},
+						},
+					},
+				},
+				{
+					Ref:     "other-ref",
+					Stream:  "stable",
+					Version: "v2.0.0",
+					List: []ImageMeasurementsV2Entry{
+						{
+							CSP:                cloudprovider.GCP,
+							AttestationVariant: "gcp-sev-es",
+							Measurements: M{
+								1: WithAllBytes(0x11, Enforce, PCRMeasurementLength),
+							},
+						},
+					},
+				},
+			},
+			wantErr: true,
+		},
+		"empty list": {
+			wantErr: true,
+		},
+	}
+
+	for name, tc := range testCases {
+		t.Run(name, func(t *testing.T) {
+			assert := assert.New(t)
+			gotMeasurements, err := MergeImageMeasurementsV2(tc.measurements...)
+
+			if tc.wantErr {
+				assert.Error(err)
+				return
+			}
+			assert.NoError(err)
+			assert.Equal(tc.wantMeasurements, gotMeasurements)
+		})
+	}
+}