{
 "meta": {
  "dataset": "Subscriber history — @book4pdf",
  "channel": "https://tgregister.com/channel/book4pdf",
  "retrieved_at": "2026-09-08T01:56:09.835Z",
  "licence": "CC BY 4.0 — attribute to tgregister.com",
  "n_readings": 21,
  "window": {
   "from": "2026-08-15T03:31:36.228Z",
   "to": "2026-09-06T23:38:01.979Z"
  },
  "columns": {
   "ts": "when this reading was taken, UTC",
   "subscribers": "the count read (or, for source 3, carried over) — see source below",
   "source": {
    "0": "sweep.py — t.me/<name> profile page",
    "1": "promote.py — Bot API getChat",
    "2": "resolve.py — MTProto",
    "3": "spromote.py — t.me/s/<name> post preview (figure carried over from an earlier profile read, not the preview’s own rounded header)",
    "4": "remeasure.py — t.me/<name> profile page, re-read on a schedule"
   }
  },
  "note": "Snapshots are written only when a reading changes: a gap in ts means \"no change observed between readings\", never \"not measured\" and never \"interpolated\". Readings from different sources are separate lineages that do not confirm one another — subtracting across them can attribute a change to a period nothing was actually read in. Full method: https://tgregister.com/methodology#measuring"
 },
 "rows": [
  {
   "ts": "2026-08-15T03:31:36.228Z",
   "subscribers": 12331,
   "source": 3
  },
  {
   "ts": "2026-08-16T03:23:54.702Z",
   "subscribers": 12338,
   "source": 4
  },
  {
   "ts": "2026-08-17T12:34:42.830Z",
   "subscribers": 12362,
   "source": 4
  },
  {
   "ts": "2026-08-18T09:12:19.327Z",
   "subscribers": 12375,
   "source": 4
  },
  {
   "ts": "2026-08-19T06:45:00.478Z",
   "subscribers": 12391,
   "source": 4
  },
  {
   "ts": "2026-08-20T07:35:51.883Z",
   "subscribers": 12435,
   "source": 4
  },
  {
   "ts": "2026-08-21T04:36:46.759Z",
   "subscribers": 12449,
   "source": 4
  },
  {
   "ts": "2026-08-22T11:58:53.327Z",
   "subscribers": 12471,
   "source": 4
  },
  {
   "ts": "2026-08-24T05:18:17.558Z",
   "subscribers": 12469,
   "source": 4
  },
  {
   "ts": "2026-08-25T05:38:04.869Z",
   "subscribers": 12474,
   "source": 4
  },
  {
   "ts": "2026-08-26T02:16:02.186Z",
   "subscribers": 12476,
   "source": 4
  },
  {
   "ts": "2026-08-26T23:04:29.950Z",
   "subscribers": 12474,
   "source": 4
  },
  {
   "ts": "2026-08-28T01:49:16.366Z",
   "subscribers": 12476,
   "source": 4
  },
  {
   "ts": "2026-08-29T04:25:12.624Z",
   "subscribers": 12495,
   "source": 4
  },
  {
   "ts": "2026-08-30T03:25:51.272Z",
   "subscribers": 12504,
   "source": 4
  },
  {
   "ts": "2026-08-31T00:07:44.250Z",
   "subscribers": 12512,
   "source": 4
  },
  {
   "ts": "2026-09-01T00:37:24.574Z",
   "subscribers": 12543,
   "source": 4
  },
  {
   "ts": "2026-09-01T22:15:42.873Z",
   "subscribers": 12558,
   "source": 4
  },
  {
   "ts": "2026-09-02T23:18:54.267Z",
   "subscribers": 12571,
   "source": 4
  },
  {
   "ts": "2026-09-04T10:16:46.394Z",
   "subscribers": 12573,
   "source": 4
  },
  {
   "ts": "2026-09-06T23:38:01.979Z",
   "subscribers": 12591,
   "source": 4
  }
 ]
}