# c2pa-python: read, validate and sign C2PA content credentials in Python, README overview

- id: src_01M6V9V8R9WCX0G1XZ2K6RBWBD
- type: source · status: active · revision: 1
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=source_inspected, execution=not_run, review=unreviewed
- categories: T20 · tags: none
- updated: 2026-11-07T15:25:46.599Z
- url: https://veyrul.com/sources/src_01M6V9V8R9WCX0G1XZ2K6RBWBD

The README presents c2pa-python as a Python library for reading and validating C2PA manifests and for creating and signing them.

Source: https://github.com/contentauth/c2pa-python

What it supplies: The README presents c2pa-python as a Python library for reading and validating C2PA manifests and for creating and signing them.

Useful for: - Check whether a media file carries valid content credentials.
- Sign and attach a manifest with assertions and ingredients to an asset.
- Follow the repository docs for Builder intents to make spec-compliant manifests.

First action: - Use Python 3.10 or later.
- Install with pip install c2pa-python and import c2pa.
- Read the usage document and supported formats list.

Prerequisites and limits: The README requires Python 3.10+. The default build downloads a prebuilt native library from a c2pa-rs release.

- Only the formats listed in the supported formats document can be read or signed.
- Usage details are in the linked documents, which were not read.

Source-documented: the project is licensed under the Apache License 2.0 and the MIT License. Signing needs certificates and keys that the README does not supply.

Written from the README text only. Statements are as the README gives them; nothing was installed or run.
Based on README text only; the linked docs, release notes and code were not read. Nothing was installed or run.

Source inspected: https://raw.githubusercontent.com/contentauth/c2pa-python/3c31c55bad632a59bb8c88ce4a54215a450eae82/README.md ; 4875 bytes ; sha256 ccbb707997a73f80be59264f2d1a0cb94cd0aee0addb09c8416031351e14aedc ; 7 exact pinned excerpts in the draft pin map

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  "usefulness": "- Check whether a media file carries valid content credentials.\n- Sign and attach a manifest with assertions and ingredients to an asset.\n- Follow the repository docs for Builder intents to make spec-compliant manifests.",
  "source_type": "repository",
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  "dependencies": [],
  "source_owner": "Content Authenticity Initiative (contentauth) (declared repository namespace)",
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  "known_limitations": [
    "The README requires Python 3.10+. The default build downloads a prebuilt native library from a c2pa-rs release.\n\n- Only the formats listed in the supported formats document can be read or signed.\n- Usage details are in the linked documents, which were not read.\n\nSource-documented: the project is licensed under the Apache License 2.0 and the MIT License. Signing needs certificates and keys that the README does not supply.\n\nWritten from the README text only. Statements are as the README gives them; nothing was installed or run.\nBased on README text only; the linked docs, release notes and code were not read. Nothing was installed or run.",
    "Rendered README text of the exact archived capture at the pinned commit, read in full by the author; no media viewed or heard; nothing executed or installed.",
    "Source-documented steps; execution not performed. Internal affiliated review is not independent validation."
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```

Rights:
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