content-credentials

AI watermark remover. CLI and Python library to strip visible and invisible AI watermarks (Gemini / Nano Banana sparkle, SynthID) and provenance metadata (C2PA, EXIF, IPTC) from images.

The open standard for proving any file is real, unaltered and sealed

Strip EXIF, GPS, C2PA / Content Credentials, AI watermarks, and Stable Diffusion / ComfyUI / Midjourney / ChatGPT prompt blocks from any image. Three modes: safe (pixel-identical), paranoid (re-encode), nuclear (disrupt SynthID/Digimarc). CLI + macOS desktop app. 100% offline.

Cryptographic proof of photo authenticity for any Android device. ECDSA P-256 signed. SHA-256 hashed. 14-sensor fingerprinted.

The world's first c2pa standard implementation that supports PDF-files signing.

A defence-in-depth strategy that's also a creative production platform

🌍 Awesome C2PA: Multi-language specifications, tools, and resources for content authenticity

Metadata checker & cleaner for AI photos and videos before posting — reads and removes hidden AI markers (C2PA / Content Credentials, EXIF, IPTC, XMP) and applies real camera data. Telegram bot @remorvibot, RU/EN.

Tiny, dependency-free CLI to detect and inspect C2PA Content Credentials (provenance) in media files — with optional cryptographic validation.

Combat fake news with cryptographic image verification. Origin Lens analyzes C2PA Content Credentials and EXIF metadata to detect AI-generated content, verify digital signatures, and reveal complete edit history. Privacy-first open source iOS app with on-device verification. (arXiv:2602.03423)

Local-first C2PA Content Credentials verifier + creator toolkit. Neural-watermark cross-check (silentcipher, AudioSeal, WavMark) and atproto-bound identity. CLI + GUI for Windows/Linux/macOS. Apache-2.0.

ChronoVerify MCP server: verify a photo's capture time and provenance (C2PA validation, EXIF/XMP, pixel forensics). Tools: verify_image (typed verdict) and get_signed_report. Local via npx, or hosted at chronoverify.com/mcp/http.

Official PHP SDK for the snapWONDERS API — steganography (hide & reveal), forensic media analysis, and format conversion in a few lines.

Open-source GitHub Action for regression-testing declared Article 50 AI disclosures and configured C2PA delivery evidence.

C2PA examined from the standpoint of artistic authorship

Duale AI's implementation of C2PA text marking (C2PA 2.4 Annex A.8)

MCP server that verifies C2PA Content Credentials and returns LLM-ready provenance verdicts. npx, zero install.

LlamaIndex tool for ChronoVerify: verify when a photo was taken and its provenance (C2PA Content Credentials, EXIF, pixel forensics). Not a deepfake detector.

PHP library for C2PA Content Credentials: build, sign, read & verify manifests, with machine-readable marking of AI-generated content (EU AI Act, Article 50). Framework-agnostic Core + optional Laravel integration.

Drop-in recipes to give any AI agent image capture-time and provenance verification with ChronoVerify: MCP one-click install, OpenAI/Claude tool defs, LangChain/LlamaIndex/CrewAI/n8n, and REST.