{
  "id": "palimpsest-news:wayback",
  "slug": "wayback-reconstruction",
  "url": "https://palimpsest.info/news/wayback-reconstruction/",
  "signal_id": "wayback",
  "headline": "Archive witnesses reconstruct 3 deletions across 21 watched URLs",
  "dek": "A deletion or silent mutation is reported only when outside-the-wall captures provide a checkable witness.",
  "section": "erasure",
  "order": 2,
  "type": "measurement",
  "priority": "high",
  "status": "live",
  "published_at": "2026-08-24T15:58:43Z",
  "modified_at": "2026-08-24T15:58:43Z",
  "claim_fingerprint": "sha256:29f447aeea3d24c239c3356d0e6b295490990e8a10a0dedb7b0e6659838e7f4e",
  "metric": {
    "label": "reconstructed deletions",
    "value": 3,
    "unit": "count",
    "denominator": {
      "label": "URLs watched",
      "value": 21
    }
  },
  "claims": [
    {
      "type": "finding",
      "statement": "Wayback evidence reconstructs 3 deletions among 21 watched URLs in the current reading."
    }
  ],
  "evidence": {
    "url": "https://palimpsest.info/readings/wayback-latest.json",
    "input": {
      "filename": "wayback-latest.json",
      "sha256": "2ee7bcbc9f07ede818b7675f28dfc72e914c154cd36e71733efd67aa9f6c4c68",
      "bytes": 72515
    },
    "source_timestamp": "2026-08-24T15:58:43Z"
  },
  "method": {
    "summary": "See the complete embedded upstream payload and its raw feed",
    "version": 2
  },
  "limitations": [
    "Archive coverage is incomplete; an unwitnessed URL cannot support a deletion or mutation claim."
  ],
  "related_signal_ids": [
    "erasure-observatory",
    "baike-redaction",
    "anchors"
  ]
}