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      "columns": [
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      "columns": [
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      "max_sequence": 302867075151208417,
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  },
  "row_count": 116704065,
  "sequence_note": "sequence and timestamp_received are collector-local provenance; where domains carry the same row, the merge keeps the EARLIEST-RECEIVED copy, equal arrivals breaking by registry order (active: c, h, e, f, i, k). The winner is per row, not per hour -- each row names its own in source_witness",
  "sha256": "9237d3768589c0801286256d0b29b0bb8f229854f2da71857675d5c905c850a6",
  "skipped_witnesses": {
    "j": {
      "alive": false,
      "listed_utc": "2026-09-22T23:07:43.437065Z",
      "newest_upload": "2026-09-22T15:20:26.168000Z",
      "reason": "not_staged"
    }
  },
  "verification": {
    "note": "A range digest certifies BYTES. That those bytes are that product comes from this manifest and is cross-checkable against the Parquet footer, which is inside the whole-file sha256.",
    "primary": "sha256sum <file> == .sha256",
    "secondary": "curl -r <start>-<end-1> <url> | sha256sum == .products.<name>.sha256"
  },
  "witness_stats": "2026-09-22T15.witness_stats.json",
  "witnesses": "chefik",
  "served_verbatim": true,
  "served_note": "This hour is the merger's union file, published byte for byte. Hours before the era cutover are rebuilt here from the seven product files and carry one column fewer."
}
