Unverified50% confidenceTradeoffExact time
C2PA metadata is often lost when an image is screenshotted or re-uploaded, and it cannot handle images that never had a signature embedded.
1
Sources
50%
Confidence
Long-term
Relevance
9/20/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedSynthID水印在图片被截图、压缩甚至轻度编辑后仍然能够保留，但在经过大幅度图像处理（如重新绘制、严重压缩）后可能失效67% similarUnverifiedC2PA is a purely software-level standard that relies on software tools to append signatures after the fact, and cannot guarantee at the hardware level the originality of an image at the moment of capture.65% similarUnverifiedAnthropic针对.svg、.png、.jpg等文件采用C2PA开放标准的签名式来源元数据64% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/936077API
curl https://kongchang.com/api/v1/knowledge/claims/936077MCP
get_claim(id=936077)