# Third-Party Notices

This project is built on commercially-licensed open-source components only.
Every dependency below has been verified against its license terms.

## Runtime dependencies

| Component                  | Version (≥) | License        | Use                                        |
|----------------------------|-------------|----------------|--------------------------------------------|
| Python                     | 3.11        | PSF            | Runtime                                    |
| PyTorch (CPU build)        | 2.3         | BSD-3-Clause   | Tensor / NN runtime                        |
| torchvision                | 0.18        | BSD-3-Clause   | Image transforms                           |
| HuggingFace `transformers` | 4.41        | Apache-2.0     | CLIP loading                               |
| HuggingFace `accelerate`   | 0.30        | Apache-2.0     | Inference helpers                          |
| OpenAI CLIP ViT-B/32       | n/a         | MIT            | Frozen image-encoder weights               |
| Pillow (PIL fork)          | 10.3        | HPND           | Image decoding                             |
| NumPy                      | 1.26        | BSD-3-Clause   | Tensor ops                                 |
| FastAPI                    | 0.111       | MIT            | Web framework                              |
| Starlette                  | (transitive)| BSD-3-Clause   | ASGI core                                  |
| Uvicorn                    | 0.29        | BSD-3-Clause   | ASGI server                                |
| python-multipart           | 0.0.9       | Apache-2.0     | File-upload parsing                        |
| Pydantic                   | 2.7         | MIT            | Schema validation                          |
| `c2pa-python`              | 0.5         | Apache-2.0     | C2PA / Content-Credentials verification    |

## Development / test dependencies

| Component | License    | Use            |
|-----------|------------|----------------|
| pytest    | MIT        | Test runner    |
| httpx     | BSD-3-Clause | Test client  |

## Stage 2 dataset-curation dependencies (NOT shipped with the inference image)

These are only installed on the GPU machine that builds the dataset.

| Component                           | License      | Use                                     |
|-------------------------------------|--------------|-----------------------------------------|
| FiftyOne                            | Apache-2.0   | Open Images V7 download / sampling      |
| `diffusers` (HuggingFace)           | Apache-2.0   | Flux.1-schnell pipeline                 |
| `black-forest-labs/FLUX.1-schnell`  | Apache-2.0   | Synthetic-image generator weights       |

## Stage 3A candidate generator license review

Review date: 2026-05-15. No Stage 3A images have been generated yet; this table
records which generators are approved for the initial multi-generator dataset.

| Component | License / terms | Status | Use |
|---|---|---|---|
| `black-forest-labs/FLUX.1-schnell` | Apache-2.0 ([HF model card](https://huggingface.co/black-forest-labs/FLUX.1-schnell)) | Approved | Already-used rectified-flow baseline. |
| `stabilityai/stable-diffusion-xl-base-1.0` | CreativeML Open RAIL++-M ([HF license](https://huggingface.co/stabilityai/stable-diffusion-xl-base-1.0/blob/main/LICENSE.md)) | Approved with use-policy restrictions | Stage 3A diffusion U-Net training source. Outputs may be used for detector training, subject to OpenRAIL use restrictions; do not use to train a competing generative model. |
| `stabilityai/stable-diffusion-3.5-medium` | Stability AI Community License ([HF model card](https://huggingface.co/stabilityai/stable-diffusion-3.5-medium), [Stability license](https://stability.ai/license)) | Conditionally approved | Stage 3A MMDiT / diffusion-transformer training source while Veridicate remains under the Community License revenue threshold and registers as required. Enterprise license required before use if annual revenue exceeds USD $1M. Outputs must not be used to create or improve a foundational generative AI model. |
| `fal/AuraFlow-v0.3` | Apache-2.0 ([HF model card](https://huggingface.co/fal/AuraFlow-v0.3)) | Approved | Stage 3A independent rectified-flow training source. |
| `PixArt-alpha/PixArt-Sigma-XL-2-1024-MS` | HF model card labels weights as CreativeML Open RAIL++-M; project code is Apache-2.0, but the model card's direct-use section says research purposes only ([HF model card](https://huggingface.co/PixArt-alpha/PixArt-Sigma-XL-2-1024-MS), [GitHub repo](https://github.com/PixArt-alpha/PixArt-sigma)) | Deferred / blocked pending clarification | Do not use for Stage 3A training until the model-weight license and model-card intended-use language are clarified. |

## Datasets used at training time

| Dataset                    | License      | Notes                                   |
|----------------------------|--------------|-----------------------------------------|
| Open Images V7             | CC BY 2.0    | Real-image class. 50,000 images sampled. Attribution preserved in `data/manifest.csv`. |
| Self-generated (Flux schnell) | Apache-2.0 (model) | AI-image class. 50,000 images generated. We own the outputs; recorded in manifest with prompt + seed. |

## Distributed artifacts (downstream of training)

| Artifact | License | Notes |
|---|---|---|
| `Veridicate/scanner-head-v1` (private HF Hub model repo) | Apache-2.0 | Trained CLIP classifier head weights (~530 KB). Downloaded at container startup by `ClipClassifier` using the `HF_TOKEN` Space secret. Trained on the Open Images + Flux-schnell dataset above, so the output weights are unencumbered. Repo is private (commercial-IP reasons) but the license on the weights themselves is Apache-2.0. |

## Explicitly NOT used (research-only / non-commercial / unclear license)

These are deliberately excluded to preserve commercial usability:

- **FaceForensics++** — research/educational use only.
- **DFDC (Deepfake Detection Challenge)** — research only.
- **Celeb-DF** — research only.
- **`flux.1-dev`** — non-commercial license. Use `flux.1-schnell` instead.
- **Outputs from closed-API image generators** — including Google
  Gemini / Imagen 3 / "Nano Banana", OpenAI DALL-E, Midjourney, xAI
  Grok Imagine / Aurora, Adobe Firefly. Their terms of service either
  restrict using outputs as training data for downstream models or
  leave it ambiguous enough that, for a commercial detector, the safe
  reading is "not allowed without an explicit license." Stage 3 of the
  roadmap (see [`docs/plan.md`](docs/plan.md)) explicitly *catches*
  these generators by training on the *open-source* equivalents of
  their underlying architectures (diffusion U-Net, DiT, rectified flow,
  GAN) and learning the family fingerprint — without ever using their
  outputs as training data. Stage 5 may revisit the closed-API path
  with negotiated enterprise license agreements, but only once
  revenue justifies the legal and per-image API spend.
- Any HuggingFace model whose license tag is `cc-by-nc-*`,
  `non-commercial`, or unspecified.

## Updating this document

Add a row whenever a new dependency is introduced. If a license is unclear,
flag it and resolve before merging — never assume.

For **forward-looking** license concerns (revenue thresholds, deferred
items, in-flight investigations), see [`docs/licensing.md`](docs/licensing.md).
That file is the live tracker; this file is the approved-and-shipped record.