diff --git a/internal/chart/v3/metadata.go b/internal/chart/v3/metadata.go
index 5f7cea897..3611dd653 100644
--- a/internal/chart/v3/metadata.go
+++ b/internal/chart/v3/metadata.go
@@ -81,6 +81,9 @@ type Metadata struct {
 	Dependencies []*Dependency `json:"dependencies,omitempty"`
 	// Specifies the chart type: application or library
 	Type string `json:"type,omitempty"`
+	// The URL from which the chart was obtained (a Helm repository URL,
+	// an OCI reference, or a direct artifact URL). Used to record provenance.
+	RepoURL string `json:"repoURL,omitempty"`
 }
 
 // Validate checks the metadata for known issues and sanitizes string
@@ -98,6 +101,7 @@ func (md *Metadata) Validate() error {
 	md.Tags = sanitizeString(md.Tags)
 	md.AppVersion = sanitizeString(md.AppVersion)
 	md.KubeVersion = sanitizeString(md.KubeVersion)
+	md.RepoURL = sanitizeString(md.RepoURL)
 	for i := range md.Sources {
 		md.Sources[i] = sanitizeString(md.Sources[i])
 	}
diff --git a/pkg/action/install.go b/pkg/action/install.go
index 6fc919366..f2aa15438 100644
--- a/pkg/action/install.go
+++ b/pkg/action/install.go
@@ -157,6 +157,19 @@ type ChartPathOptions struct {
 	// registryClient provides a registry client but is not added with
 	// options from a flag
 	registryClient *registry.Client
+
+	// resolvedRepoURL is the source URL from which the chart was obtained
+	// during the last LocateChart call. It is independent of RepoURL
+	// (the --repo input) and is used to record provenance into chart metadata.
+	resolvedRepoURL string
+}
+
+// ResolvedRepoURL returns the source URL from which the chart was obtained
+// during the last LocateChart call (a Helm repository URL, an OCI reference,
+// or a direct artifact URL). It is empty for local-path installs or when
+// LocateChart has not been called.
+func (c *ChartPathOptions) ResolvedRepoURL() string {
+	return c.resolvedRepoURL
 }
 
 // NewInstall creates a new Install object with the given configuration.
@@ -372,6 +385,18 @@ func (i *Install) RunWithContext(ctx context.Context, ch ci.Charter, vals map[st
 		return nil, fmt.Errorf("user supplied labels contains system reserved label name. System labels: %+v", driver.GetSystemLabels())
 	}
 
+	// Stamp provenance information into the chart metadata. Prefer the URL
+	// discovered by LocateChart (ResolvedRepoURL) and fall back to the --repo
+	// input for library consumers who set it without calling LocateChart.
+	// Do not overwrite a value already set in Chart.yaml.
+	if chrt.Metadata != nil && chrt.Metadata.RepoURL == "" {
+		if u := i.ChartPathOptions.ResolvedRepoURL(); u != "" {
+			chrt.Metadata.RepoURL = u
+		} else if i.ChartPathOptions.RepoURL != "" {
+			chrt.Metadata.RepoURL = i.ChartPathOptions.RepoURL
+		}
+	}
+
 	rel := i.createRelease(chrt, vals, i.Labels)
 
 	var manifestDoc *bytes.Buffer
@@ -876,6 +901,20 @@ func urlEqual(u1, u2 *url.URL) bool {
 	return u1.Scheme == u2.Scheme && u1.Hostname() == u2.Hostname() && portOrDefault(u1) == portOrDefault(u2)
 }
 
+// isRemoteChartRef reports whether ref points to a remote chart (an OCI
+// reference or an absolute http(s) URL), as opposed to a local path or a
+// repo-by-name reference.
+func isRemoteChartRef(ref string) bool {
+	if registry.IsOCI(ref) {
+		return true
+	}
+	u, err := url.Parse(ref)
+	if err != nil {
+		return false
+	}
+	return u.IsAbs() && (u.Scheme == "http" || u.Scheme == "https")
+}
+
 // LocateChart looks for a chart directory in known places, and returns either the full path or an error.
 //
 // This does not ensure that the chart is well-formed; only that the requested filename exists.
@@ -891,6 +930,10 @@ func (c *ChartPathOptions) LocateChart(name string, settings *cli.EnvSettings) (
 		return "", fmt.Errorf("unable to lookup chart %q, missing registry client", name)
 	}
 
+	// Reset any provenance recorded by a previous call so callers that reuse
+	// this instance do not observe stale values from an earlier chart.
+	c.resolvedRepoURL = ""
+
 	name = strings.TrimSpace(name)
 	version := strings.TrimSpace(c.Version)
 
@@ -984,6 +1027,22 @@ func (c *ChartPathOptions) LocateChart(name string, settings *cli.EnvSettings) (
 		return "", err
 	}
 
+	// Record provenance information about where the chart was resolved from.
+	// Prefer the URL discovered by the downloader, then the --repo input,
+	// then the original reference when it is an OCI ref or an absolute URL.
+	// Local paths and unresolvable references leave resolvedRepoURL empty so
+	// callers can distinguish them. We deliberately do not mutate RepoURL,
+	// because it is also the --repo flag input and controls local-path vs
+	// remote resolution on subsequent calls.
+	switch {
+	case dl.RepositoryURL() != "":
+		c.resolvedRepoURL = dl.RepositoryURL()
+	case c.RepoURL != "":
+		c.resolvedRepoURL = c.RepoURL
+	case isRemoteChartRef(name):
+		c.resolvedRepoURL = name
+	}
+
 	lname, err := filepath.Abs(filename)
 	if err != nil {
 		return filename, err
diff --git a/pkg/action/repourl2_test.go b/pkg/action/repourl2_test.go
new file mode 100644
index 000000000..676999e88
--- /dev/null
+++ b/pkg/action/repourl2_test.go
@@ -0,0 +1,62 @@
+package action
+
+import (
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"helm.sh/helm/v4/pkg/chart/v2/loader"
+	chartutil "helm.sh/helm/v4/pkg/chart/v2/util"
+)
+
+func TestRenderRepoURL2_ValidAndInvalid(t *testing.T) {
+	cfg := actionConfigFixture(t)
+
+	tests := []struct {
+		name       string
+		chartPath  string
+		expectPart string
+	}{
+		{
+			name:       "valid repoURL",
+			chartPath:  "testdata/charts/chart-with-repourl-valid",
+			expectPart: `repoURL: "https://example.com/charts"`,
+		},
+		{
+			name:       "invalid repoURL",
+			chartPath:  "testdata/charts/chart-with-repourl-invalid",
+			expectPart: `repoURL: "ht!tp://not-a-valid-url"`,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			ch, err := loader.Load(tt.chartPath)
+			require.NoError(t, err)
+			if ch.Metadata == nil {
+				md, err := chartutil.LoadChartfile(filepath.Join(tt.chartPath, "Chart.yaml"))
+				require.NoError(t, err)
+				ch.Metadata = md
+			}
+
+			_, buf, _, err := cfg.renderResources(
+				ch,
+				map[string]interface{}{},
+				"test-release",
+				"",
+				false,
+				false,
+				false,
+				nil,
+				false,
+				false,
+				false,
+			)
+			require.NoError(t, err)
+			require.NotNil(t, buf)
+			assert.Contains(t, buf.String(), tt.expectPart)
+		})
+	}
+}
diff --git a/pkg/action/testdata/charts/chart-with-repourl-invalid/Chart.yaml b/pkg/action/testdata/charts/chart-with-repourl-invalid/Chart.yaml
new file mode 100644
index 000000000..89a08d5ef
--- /dev/null
+++ b/pkg/action/testdata/charts/chart-with-repourl-invalid/Chart.yaml
@@ -0,0 +1,5 @@
+apiVersion: v2
+name: chart-with-repourl-invalid
+version: 0.1.0
+description: Test chart containing an invalid repoURL in metadata
+repoURL: "ht!tp://not-a-valid-url"
diff --git a/pkg/action/testdata/charts/chart-with-repourl-invalid/templates/configmap.yaml b/pkg/action/testdata/charts/chart-with-repourl-invalid/templates/configmap.yaml
new file mode 100644
index 000000000..ec74e9cb4
--- /dev/null
+++ b/pkg/action/testdata/charts/chart-with-repourl-invalid/templates/configmap.yaml
@@ -0,0 +1,6 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: chart-with-repourl-invalid-cm
+data:
+  repoURL: {{ .Chart.RepoURL | quote }}
diff --git a/pkg/action/testdata/charts/chart-with-repourl-valid/Chart.yaml b/pkg/action/testdata/charts/chart-with-repourl-valid/Chart.yaml
new file mode 100644
index 000000000..7f4d9e0bf
--- /dev/null
+++ b/pkg/action/testdata/charts/chart-with-repourl-valid/Chart.yaml
@@ -0,0 +1,5 @@
+apiVersion: v2
+name: chart-with-repourl-valid
+version: 0.1.0
+description: Test chart containing a valid repoURL in metadata
+repoURL: https://example.com/charts
diff --git a/pkg/action/testdata/charts/chart-with-repourl-valid/templates/configmap.yaml b/pkg/action/testdata/charts/chart-with-repourl-valid/templates/configmap.yaml
new file mode 100644
index 000000000..2629a1021
--- /dev/null
+++ b/pkg/action/testdata/charts/chart-with-repourl-valid/templates/configmap.yaml
@@ -0,0 +1,6 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: chart-with-repourl-valid-cm
+data:
+  repoURL: {{ .Chart.RepoURL | quote }}
diff --git a/pkg/action/testdata/charts/multiplecharts-lint-chart-2/Chart.yaml b/pkg/action/testdata/charts/multiplecharts-lint-chart-2/Chart.yaml
index b27de2754..7f348df6a 100644
--- a/pkg/action/testdata/charts/multiplecharts-lint-chart-2/Chart.yaml
+++ b/pkg/action/testdata/charts/multiplecharts-lint-chart-2/Chart.yaml
@@ -1,4 +1,4 @@
 apiVersion: v1
 name: multiplecharts-lint-chart-2
 version: "1"
-icon: ""
\ No newline at end of file
+icon: ""
diff --git a/pkg/action/upgrade.go b/pkg/action/upgrade.go
index 85904124b..83683d012 100644
--- a/pkg/action/upgrade.go
+++ b/pkg/action/upgrade.go
@@ -315,6 +315,18 @@ func (u *Upgrade) prepareUpgrade(ctx context.Context, name string, chart *chartv
 
 	u.cfg.Logger().Debug("determined release apply method", slog.Bool("server_side_apply", serverSideApply), slog.String("previous_release_apply_method", lastRelease.ApplyMethod))
 
+	// Stamp provenance information into the chart metadata. Prefer the URL
+	// discovered by LocateChart (ResolvedRepoURL) and fall back to the --repo
+	// input for library consumers who set it without calling LocateChart.
+	// Do not overwrite a value already set in Chart.yaml.
+	if chart.Metadata != nil && chart.Metadata.RepoURL == "" {
+		if r := u.ChartPathOptions.ResolvedRepoURL(); r != "" {
+			chart.Metadata.RepoURL = r
+		} else if u.ChartPathOptions.RepoURL != "" {
+			chart.Metadata.RepoURL = u.ChartPathOptions.RepoURL
+		}
+	}
+
 	// Store an upgraded release.
 	upgradedRelease := &release.Release{
 		Name:      name,
diff --git a/pkg/chart/v2/metadata.go b/pkg/chart/v2/metadata.go
index 5df307321..a4078efde 100644
--- a/pkg/chart/v2/metadata.go
+++ b/pkg/chart/v2/metadata.go
@@ -52,6 +52,9 @@ type Metadata struct {
 	Home string `json:"home,omitempty"`
 	// Source is the URL to the source code of this chart
 	Sources []string `json:"sources,omitempty"`
+	// The URL from which the chart was obtained (a Helm repository URL,
+	// an OCI reference, or a direct artifact URL). Used to record provenance.
+	RepoURL string `json:"repoURL,omitempty"`
 	// A version string of the chart. Required.
 	Version string `json:"version,omitempty"`
 	// A one-sentence description of the chart
@@ -93,6 +96,7 @@ func (md *Metadata) Validate() error {
 	md.Name = sanitizeString(md.Name)
 	md.Description = sanitizeString(md.Description)
 	md.Home = sanitizeString(md.Home)
+	md.RepoURL = sanitizeString(md.RepoURL)
 	md.Icon = sanitizeString(md.Icon)
 	md.Condition = sanitizeString(md.Condition)
 	md.Tags = sanitizeString(md.Tags)
diff --git a/pkg/downloader/chart_downloader.go b/pkg/downloader/chart_downloader.go
index 712c80ad2..eb7c7249b 100644
--- a/pkg/downloader/chart_downloader.go
+++ b/pkg/downloader/chart_downloader.go
@@ -85,6 +85,15 @@ type ChartDownloader struct {
 
 	// Cache specifies the cache implementation to use.
 	Cache Cache
+
+	// repositoryURL is the resolved Helm repository URL, set by
+	// ResolveChartVersion when the chart is looked up via a configured repo.
+	repositoryURL string
+}
+
+// RepositoryURL returns the resolved Helm repository URL, if any.
+func (c *ChartDownloader) RepositoryURL() string {
+	return c.repositoryURL
 }
 
 // DownloadTo retrieves a chart. Depending on the settings, it may also download a provenance file.
@@ -363,6 +372,11 @@ func (c *ChartDownloader) DownloadToCache(ref, version string) (string, *provena
 //
 // TODO: support OCI hash
 func (c *ChartDownloader) ResolveChartVersion(ref, version string) (string, *url.URL, error) {
+	// Clear any URL recorded by a previous call so RepositoryURL() does not
+	// report stale provenance when the same ChartDownloader instance is
+	// reused for a chart that does not resolve to a configured repo.
+	c.repositoryURL = ""
+
 	u, err := url.Parse(ref)
 	if err != nil {
 		return "", nil, fmt.Errorf("invalid chart URL format: %s", ref)
@@ -403,6 +417,9 @@ func (c *ChartDownloader) ResolveChartVersion(ref, version string) (string, *url
 
 		// If we get here, we don't need to go through the next phase of looking
 		// up the URL. We have it already. So we just set the parameters and return.
+		if rc.URL != "" {
+			c.repositoryURL = rc.URL
+		}
 		c.Options = append(
 			c.Options,
 			getter.WithURL(rc.URL),
@@ -443,6 +460,9 @@ func (c *ChartDownloader) ResolveChartVersion(ref, version string) (string, *url
 	}
 
 	if r != nil && r.Config != nil {
+		if r.Config.URL != "" {
+			c.repositoryURL = r.Config.URL
+		}
 		if r.Config.CertFile != "" || r.Config.KeyFile != "" || r.Config.CAFile != "" {
 			c.Options = append(c.Options, getter.WithTLSClientConfig(r.Config.CertFile, r.Config.KeyFile, r.Config.CAFile))
 		}