content-credentials

Remove visible and invisible AI watermarks and provenance metadata from images and video. Python library and CLI for SynthID, C2PA, EXIF, IPTC, XMP, and common generative-AI marks.

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

Invisible, key-verifiable watermarks for AI/LLM-generated text — SynthID-Text-style, in Rust + WebAssembly (Node + browser). Live playground included.

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.

ComfyUI custom nodes for detecting provenance marks, removing visible and invisible AI watermarks, stripping metadata, and erasing selected regions.

Test what AI watermark and provenance evidence exists, whether it verifies, and what survives publishing.

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.

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

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

Research-only AI watermark & provenance robustness toolkit: local reverse proxy (OpenAI/Anthropic/Gemini) + CLI stripping C2PA/EXIF/XMP, zero-width & homoglyph Unicode, KGW text watermarks, DWT/Tree-Ring image stego, AudioSeal, PDF/DOCX/PPTX/XLSX metadata, and Trojan Source (CVE-2021-42574) code scanning.

数字水印实验室：AI 文本水印检测、C2PA 内容凭证读取、零宽字符隐写、LSB 与频域盲水印，9 个纯前端工具，打开即用不上传文件

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

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

Free open-source AI watermark, metadata and provenance cleaner. Inspect → Clean → Verify.

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.

Image provenance for AI agents: the 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.

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)

Experimental C2PA/CAWG workflow semantics for human–AI edit loops and causal action dependencies.