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    "story_id": "mp-2026-11-12-018",
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    "headline": "The Deepfake Detector Finds Provenance, Not Pulse",
    "slug": "the-deepfake-detector-finds-provenance-not-pulse",
    "dek": "High-frequency video artifacts explain a near-perfect physiological-looking signal in a controlled audit.",
    "summary": "High-frequency video artifacts explain a near-perfect physiological-looking signal in a controlled audit.",
    "body_text": "The study finds that simple chrominance traces separate talking-face forgeries extremely well, but controlled tests place the signal outside the heart-rate band and show it in backgrounds and whole frames. Cross-dataset failures and overlapping identities further indicate that several detectors learn source-video provenance rather than a cardiac cue.",
    "why_it_matters": "High-frequency video artifacts explain a near-perfect physiological-looking signal in a controlled audit.",
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    "tags": [
      "deepfakes",
      "rppg",
      "evaluation",
      "provenance"
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      "title": "arXiv:2611.13992v1",
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      "published_at": "2026-11-10T07:36:56.000-05:00",
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    "description": "A daily newspaper for the age of artificial intelligence."
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    "title": "The Deepfake Detector Finds Provenance, Not Pulse",
    "publisher": "The Machine Press",
    "published_at": "2026-11-12T09:00:00.000-05:00",
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