diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
new file mode 100644
index 00000000..29fd7cd3
--- /dev/null
+++ b/.github/workflows/release.yml
@@ -0,0 +1,111 @@
+name: Release
+
+# Builds multi-platform wheels + sdist and (optionally) publishes to PyPI /
+# TestPyPI via Trusted Publishing (OIDC) — no API token is stored.
+#
+# Triggers:
+#   * push tag v*        -> build, gate on provenance, publish to PyPI.
+#   * workflow_dispatch  -> build, and publish to the chosen target:
+#                           none (artifacts only), testpypi, or pypi.
+#
+# One-time setup before the first real publish (see docs/releasing.md):
+#   * Configure a PyPI Trusted Publisher for this repo + workflow, and a
+#     TestPyPI one for dry runs.
+#   * Create GitHub environments named `pypi` and `testpypi`.
+
+on:
+  push:
+    tags: ["v*"]
+  workflow_dispatch:
+    inputs:
+      publish:
+        description: Where to publish the built artifacts
+        type: choice
+        options: [none, testpypi, pypi]
+        default: none
+
+permissions:
+  contents: read
+
+jobs:
+  provenance-check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+      - name: Check release provenance
+        shell: bash
+        run: |
+          if [ "${{ github.event_name }}" = "push" ]; then
+            # Real tagged release: require full traceability.
+            python scripts/check_release_provenance.py --tag "${{ github.ref_name }}"
+          elif [ "${{ inputs.publish }}" = "pypi" ]; then
+            python scripts/check_release_provenance.py
+          else
+            # Dry run / artifact-only / TestPyPI: allow placeholder provenance.
+            python scripts/check_release_provenance.py --allow-unknown
+          fi
+
+  build_wheels:
+    needs: provenance-check
+    name: Wheels on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-14, windows-latest]
+    steps:
+      - uses: actions/checkout@v4
+      - name: Build wheels
+        uses: pypa/cibuildwheel@v2.21.3
+      - uses: actions/upload-artifact@v4
+        with:
+          name: wheels-${{ matrix.os }}
+          path: ./wheelhouse/*.whl
+
+  build_sdist:
+    needs: provenance-check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+      - name: Build sdist
+        run: pipx run build --sdist
+      - uses: actions/upload-artifact@v4
+        with:
+          name: sdist
+          path: dist/*.tar.gz
+
+  publish_testpypi:
+    needs: [build_wheels, build_sdist]
+    if: github.event_name == 'workflow_dispatch' && inputs.publish == 'testpypi'
+    runs-on: ubuntu-latest
+    environment: testpypi
+    permissions:
+      id-token: write
+    steps:
+      - uses: actions/download-artifact@v4
+        with:
+          path: dist
+          merge-multiple: true
+      - uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          repository-url: https://test.pypi.org/legacy/
+
+  publish_pypi:
+    needs: [build_wheels, build_sdist]
+    if: github.event_name == 'push' || (github.event_name == 'workflow_dispatch' && inputs.publish == 'pypi')
+    runs-on: ubuntu-latest
+    environment: pypi
+    permissions:
+      id-token: write
+    steps:
+      - uses: actions/download-artifact@v4
+        with:
+          path: dist
+          merge-multiple: true
+      - uses: pypa/gh-action-pypi-publish@release/v1
diff --git a/README.md b/README.md
index 75a88526..4585d0e4 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 Python port of the R NNS 13.0 package.
 
-- Distribution package: `NNS`
+- Distribution package: `ovvo-nns` (`pip install ovvo-nns`)
 - Import package: `nns` (`import nns`)
 - Native extension: `nns._nnscore`
 - Runtime dependencies: NumPy, SciPy
@@ -13,7 +13,7 @@ Python port of the R NNS 13.0 package.
 ## Install
 
 ```bash
-pip install NNS
+pip install ovvo-nns
 ```
 
 ## Quick Use
diff --git a/docs/releasing.md b/docs/releasing.md
new file mode 100644
index 00000000..e8c91b91
--- /dev/null
+++ b/docs/releasing.md
@@ -0,0 +1,86 @@
+# Releasing NNS-python to PyPI
+
+NNS-python ships a native (C++17 / nanobind) extension, so a release builds
+multi-platform wheels with [`cibuildwheel`](https://cibuildwheel.pypa.io) plus an
+sdist, and publishes via **PyPI Trusted Publishing (OIDC)** — no API token is
+stored in the repo.
+
+The pipeline is `.github/workflows/release.yml`.
+
+The official distribution name is **`ovvo-nns`** (`pip install ovvo-nns`, then
+`import nns`). The import package stays `nns`.
+
+## One-time setup
+
+### 1. Claim the PyPI project name
+The first Trusted-Publishing upload registers the `ovvo-nns` name to your
+account/organization — no takeover of the legacy `NNS` project is required. Use
+your own PyPI account (enable 2FA), and consider owning it under a PyPI
+**Organization** (e.g. `OVVO-Financial`). For the very first publish, add a
+**pending** Trusted Publisher (PyPI → *Your projects* → *Publishing* → *Add a
+pending publisher*) for the not-yet-existing `ovvo-nns` project.
+
+(Optional: if you later also obtain the legacy `NNS` name, you can publish it as
+an alias pointing at the same `import nns` package.)
+
+### 2. Configure Trusted Publishers
+On PyPI (and TestPyPI) for project **`ovvo-nns`** → **Publishing** → add a GitHub
+Actions trusted publisher:
+
+| Field | Value |
+| --- | --- |
+| PyPI Project Name | `ovvo-nns` |
+| Owner | `OVVO-Financial` |
+| Repository | `NNS-python` |
+| Workflow name | `release.yml` |
+| Environment | `pypi` (and `testpypi` on TestPyPI) |
+
+### 3. Create GitHub environments
+Repo **Settings → Environments** → create `pypi` and `testpypi`. Optionally add
+required reviewers on `pypi` for a manual approval gate before publish.
+
+No `ANTHROPIC_API_KEY` / PyPI token secret is needed — Trusted Publishing uses
+the workflow's OIDC identity, and PEP 740 provenance attestations are generated
+automatically.
+
+## Wheels built
+
+`[tool.cibuildwheel]` in `pyproject.toml` builds CPython **3.11–3.13** for:
+
+* Linux manylinux + musllinux (`x86_64`)
+* macOS `x86_64` and `arm64`
+* Windows `AMD64`
+
+Each wheel is smoke-tested (`import nns._nnscore` + a numeric call). PyPy and
+32-bit targets are skipped.
+
+## Cutting a release
+
+1. Finalize the version in `pyproject.toml` (drop the pre-release suffix when
+   ready, e.g. `1.0.0a0` → `1.0.0`).
+2. **Make the release traceable**: set `r_commit` and `core_commit` in
+   `sync/nns_source.json` to the R and NNS-core commits this build corresponds
+   to. The provenance gate **fails a tagged release** while these are `unknown`.
+3. Dry run end to end against TestPyPI:
+   * Actions → **Release** → *Run workflow* → `publish: testpypi`.
+   * Verify the artifacts and `pip install -i https://test.pypi.org/simple/ ovvo-nns`.
+4. Tag and push to publish to PyPI:
+   ```bash
+   git tag v1.0.0
+   git push origin v1.0.0
+   ```
+   The tag triggers `release.yml`, which gates on provenance, builds all
+   wheels + sdist, and publishes to PyPI.
+
+`workflow_dispatch` with `publish: none` builds and uploads the artifacts to the
+Actions run without publishing — useful for inspecting wheels.
+
+## Provenance gate
+
+`scripts/check_release_provenance.py` enforces, for a tagged release:
+
+* the tag matches the `pyproject.toml` version (`v<version>`), and
+* `sync/nns_source.json` records non-placeholder `r_commit`, `core_commit`, and
+  `r_version`.
+
+Dry runs pass `--allow-unknown` so placeholder provenance does not block testing.
diff --git a/pyproject.toml b/pyproject.toml
index 09df3b3f..5e8c93b1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,10 +1,18 @@
 [project]
-name = "NNS"
+name = "ovvo-nns"
 version = "1.0.0a0"
 description = "Python port of nonlinear nonparametric statistics from R NNS"
 readme = "README.md"
 requires-python = ">=3.11"
 license = "GPL-3.0-only"
+authors = [
+    { name = "Fred Viole", email = "ovvo.open.source@gmail.com" },
+    { name = "Roberto Spadim" },
+    { name = "Rasheed Khoshnaw" },
+]
+maintainers = [
+    { name = "Fred Viole", email = "ovvo.open.source@gmail.com" },
+]
 classifiers = [
     "Development Status :: 3 - Alpha",
     "Intended Audience :: Science/Research",
@@ -104,3 +112,18 @@ python_version = "3.11"
 strict = true
 files = ["src/nns", "tests"]
 mypy_path = ["tests"]
+
+[tool.cibuildwheel]
+# Native (C++17 / nanobind) extension: build CPython wheels across 3.11-3.13.
+# scikit-build-core fetches cmake/ninja as build deps, so no system CMake needed.
+build = "cp311-* cp312-* cp313-*"
+skip = ["pp*", "*_i686", "*-win32", "*-musllinux_i686"]
+build-frontend = "build"
+# Smoke-test every built wheel: the native extension imports and computes.
+test-command = 'python -c "import nns, nns._nnscore as c; print(c.lpm(2.0, 0.0, [-2.0, -1.0, 0.5, 3.0]))"'
+
+[tool.cibuildwheel.macos]
+archs = ["x86_64", "arm64"]
+
+[tool.cibuildwheel.windows]
+archs = ["AMD64"]
diff --git a/scripts/check_release_provenance.py b/scripts/check_release_provenance.py
new file mode 100644
index 00000000..698c9fc5
--- /dev/null
+++ b/scripts/check_release_provenance.py
@@ -0,0 +1,78 @@
+"""Release-readiness provenance gate for NNS-python.
+
+Validates that a release is traceable before it is published:
+
+* the git tag (when given) matches the `pyproject.toml` project version, and
+* `sync/nns_source.json` records the R and NNS-core commits this release is
+  built from (not the `unknown` placeholders).
+
+Used by `.github/workflows/release.yml`. For dry runs (TestPyPI / artifact-only
+builds) pass `--allow-unknown` to permit placeholder provenance.
+
+Exits non-zero with a clear message when a real release is not traceable.
+"""
+
+from __future__ import annotations
+
+import argparse
+import json
+import sys
+import tomllib
+from pathlib import Path
+
+PLACEHOLDERS = {"", "unknown", None}
+
+
+def project_version(pyproject: Path) -> str:
+    data = tomllib.loads(pyproject.read_text(encoding="utf-8"))
+    return str(data["project"]["version"])
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--tag", default="", help="release tag, e.g. v1.0.0")
+    parser.add_argument("--manifest", type=Path, default=Path("sync/nns_source.json"))
+    parser.add_argument("--pyproject", type=Path, default=Path("pyproject.toml"))
+    parser.add_argument(
+        "--allow-unknown",
+        action="store_true",
+        help="permit placeholder R/core provenance (dry runs / TestPyPI)",
+    )
+    args = parser.parse_args()
+
+    problems: list[str] = []
+
+    version = project_version(args.pyproject)
+    tag = args.tag.lstrip("v").strip()
+    if tag and tag != version:
+        problems.append(
+            f"tag '{args.tag}' does not match pyproject version '{version}' "
+            f"(expected tag 'v{version}')"
+        )
+
+    manifest = json.loads(args.manifest.read_text(encoding="utf-8"))
+    if not args.allow_unknown:
+        for field in ("r_commit", "core_commit"):
+            if manifest.get(field) in PLACEHOLDERS:
+                problems.append(
+                    f"sync/nns_source.json '{field}' is unset/placeholder "
+                    f"('{manifest.get(field)}'); a real release must record it "
+                    "so the published version is traceable to R + NNS-core"
+                )
+        if manifest.get("r_version") in PLACEHOLDERS:
+            problems.append("sync/nns_source.json 'r_version' is unset")
+
+    if problems:
+        print("Release provenance check FAILED:")
+        for p in problems:
+            print(f"  - {p}")
+        return 1
+
+    print(f"Release provenance OK (version {version}, tag '{args.tag or '(none)'}').")
+    if args.allow_unknown:
+        print("  (placeholder R/core provenance allowed for this dry run)")
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())
diff --git a/tests/tools/test_release_provenance.py b/tests/tools/test_release_provenance.py
new file mode 100644
index 00000000..4cc39e2b
--- /dev/null
+++ b/tests/tools/test_release_provenance.py
@@ -0,0 +1,64 @@
+from __future__ import annotations
+
+import json
+import subprocess
+import sys
+from pathlib import Path
+
+REPO_ROOT = Path(__file__).resolve().parents[2]
+SCRIPT = REPO_ROOT / "scripts" / "check_release_provenance.py"
+PYPROJECT = REPO_ROOT / "pyproject.toml"
+
+
+def _run(args: list[str]) -> subprocess.CompletedProcess[str]:
+    return subprocess.run(
+        [sys.executable, str(SCRIPT), *args],
+        cwd=REPO_ROOT,
+        capture_output=True,
+        text=True,
+        check=False,
+    )
+
+
+def _project_version() -> str:
+    import tomllib
+
+    data = tomllib.loads(PYPROJECT.read_text(encoding="utf-8"))
+    return str(data["project"]["version"])
+
+
+def _write_manifest(path: Path, **overrides: object) -> None:
+    manifest: dict[str, object] = {
+        "r_repo": "OVVO-Financial/NNS",
+        "r_commit": "unknown",
+        "r_version": "13.0",
+        "core_commit": "unknown",
+    }
+    manifest.update(overrides)
+    path.write_text(json.dumps(manifest), encoding="utf-8")
+
+
+def test_allow_unknown_passes_with_placeholder_provenance() -> None:
+    result = _run(["--allow-unknown"])
+    assert result.returncode == 0, result.stdout + result.stderr
+
+
+def test_unknown_provenance_fails_real_release() -> None:
+    result = _run([])
+    assert result.returncode != 0
+    assert "provenance" in (result.stdout + result.stderr).lower()
+
+
+def test_tag_mismatch_fails(tmp_path: Path) -> None:
+    manifest = tmp_path / "manifest.json"
+    _write_manifest(manifest, r_commit="abc123", core_commit="def456")
+    result = _run(["--tag", "v9.9.9", "--manifest", str(manifest)])
+    assert result.returncode != 0
+    assert "does not match" in (result.stdout + result.stderr)
+
+
+def test_matching_tag_and_full_provenance_passes(tmp_path: Path) -> None:
+    manifest = tmp_path / "manifest.json"
+    _write_manifest(manifest, r_commit="abc123", core_commit="def456")
+    result = _run(["--tag", f"v{_project_version()}", "--manifest", str(manifest)])
+    assert result.returncode == 0, result.stdout + result.stderr