{
 "meta": {
  "dataset": "Subscriber history — @UPSC_PDF_notes",
  "channel": "https://tgregister.com/channel/UPSC_PDF_notes",
  "retrieved_at": "2026-08-27T17:26:44.776Z",
  "licence": "CC BY 4.0 — attribute to tgregister.com",
  "n_readings": 20,
  "window": {
   "from": "2026-08-07T00:15:41.222Z",
   "to": "2026-08-27T03:07:47.362Z"
  },
  "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": "2026-08-07T00:15:41.222Z",
   "subscribers": 15169,
   "source": 0
  },
  {
   "ts": "2026-08-07T16:58:15.916Z",
   "subscribers": 15167,
   "source": 4
  },
  {
   "ts": "2026-08-08T19:40:42.976Z",
   "subscribers": 15166,
   "source": 4
  },
  {
   "ts": "2026-08-09T21:52:15.030Z",
   "subscribers": 15159,
   "source": 4
  },
  {
   "ts": "2026-08-10T22:24:19.697Z",
   "subscribers": 15163,
   "source": 4
  },
  {
   "ts": "2026-08-11T21:22:33.910Z",
   "subscribers": 15172,
   "source": 4
  },
  {
   "ts": "2026-08-12T20:33:42.602Z",
   "subscribers": 15168,
   "source": 4
  },
  {
   "ts": "2026-08-14T00:58:50.253Z",
   "subscribers": 15159,
   "source": 4
  },
  {
   "ts": "2026-08-15T07:52:24.986Z",
   "subscribers": 15152,
   "source": 4
  },
  {
   "ts": "2026-08-16T19:48:21.074Z",
   "subscribers": 15136,
   "source": 4
  },
  {
   "ts": "2026-08-17T20:33:16.753Z",
   "subscribers": 15128,
   "source": 4
  },
  {
   "ts": "2026-08-18T17:33:06.350Z",
   "subscribers": 15123,
   "source": 4
  },
  {
   "ts": "2026-08-19T09:44:23.189Z",
   "subscribers": 15123,
   "source": 1
  },
  {
   "ts": "2026-08-19T18:11:55.948Z",
   "subscribers": 15130,
   "source": 4
  },
  {
   "ts": "2026-08-20T19:52:30.347Z",
   "subscribers": 15129,
   "source": 4
  },
  {
   "ts": "2026-08-22T03:58:23.958Z",
   "subscribers": 15121,
   "source": 4
  },
  {
   "ts": "2026-08-23T22:55:25.481Z",
   "subscribers": 15114,
   "source": 4
  },
  {
   "ts": "2026-08-25T04:03:47.357Z",
   "subscribers": 15106,
   "source": 4
  },
  {
   "ts": "2026-08-26T05:25:55.143Z",
   "subscribers": 15096,
   "source": 4
  },
  {
   "ts": "2026-08-27T03:07:47.362Z",
   "subscribers": 15091,
   "source": 4
  }
 ]
}