{
 "meta": {
  "dataset": "Subscriber history — @fast_courses",
  "channel": "https://tgregister.com/channel/fast_courses",
  "retrieved_at": "2026-09-11T15:37:28.121Z",
  "licence": "CC BY 4.0 — attribute to tgregister.com",
  "n_readings": 28,
  "window": {
   "from": "2026-08-07T12:07:19.587Z",
   "to": "2026-09-11T06:37:22.953Z"
  },
  "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": "2026-08-07T12:07:19.587Z",
   "subscribers": 12697,
   "source": 0
  },
  {
   "ts": "2026-08-08T19:22:47.442Z",
   "subscribers": 12689,
   "source": 4
  },
  {
   "ts": "2026-08-09T22:12:17.249Z",
   "subscribers": 12684,
   "source": 4
  },
  {
   "ts": "2026-08-10T21:56:08.302Z",
   "subscribers": 12680,
   "source": 4
  },
  {
   "ts": "2026-08-12T01:02:21.843Z",
   "subscribers": 12678,
   "source": 4
  },
  {
   "ts": "2026-08-13T01:43:38.202Z",
   "subscribers": 12675,
   "source": 4
  },
  {
   "ts": "2026-08-14T10:18:48.592Z",
   "subscribers": 12673,
   "source": 4
  },
  {
   "ts": "2026-08-16T03:24:13.657Z",
   "subscribers": 12669,
   "source": 4
  },
  {
   "ts": "2026-08-17T11:48:26.406Z",
   "subscribers": 12661,
   "source": 4
  },
  {
   "ts": "2026-08-18T15:17:52.244Z",
   "subscribers": 12658,
   "source": 4
  },
  {
   "ts": "2026-08-19T17:36:13.669Z",
   "subscribers": 12652,
   "source": 4
  },
  {
   "ts": "2026-08-20T16:51:08.161Z",
   "subscribers": 12652,
   "source": 1
  },
  {
   "ts": "2026-08-20T20:46:11.222Z",
   "subscribers": 12651,
   "source": 4
  },
  {
   "ts": "2026-08-22T05:55:24.479Z",
   "subscribers": 12643,
   "source": 4
  },
  {
   "ts": "2026-08-23T21:05:49.984Z",
   "subscribers": 12636,
   "source": 4
  },
  {
   "ts": "2026-08-25T03:46:55.312Z",
   "subscribers": 12631,
   "source": 4
  },
  {
   "ts": "2026-08-26T06:44:28.534Z",
   "subscribers": 12626,
   "source": 4
  },
  {
   "ts": "2026-08-27T08:36:37.578Z",
   "subscribers": 12620,
   "source": 4
  },
  {
   "ts": "2026-08-28T09:23:17.179Z",
   "subscribers": 12617,
   "source": 4
  },
  {
   "ts": "2026-08-29T10:25:28.437Z",
   "subscribers": 12612,
   "source": 4
  },
  {
   "ts": "2026-08-30T09:44:36.332Z",
   "subscribers": 12606,
   "source": 4
  },
  {
   "ts": "2026-08-31T06:34:50.538Z",
   "subscribers": 12593,
   "source": 4
  },
  {
   "ts": "2026-09-01T06:08:48.390Z",
   "subscribers": 12588,
   "source": 4
  },
  {
   "ts": "2026-09-02T06:35:03.865Z",
   "subscribers": 12583,
   "source": 4
  },
  {
   "ts": "2026-09-03T12:18:51.836Z",
   "subscribers": 12572,
   "source": 4
  },
  {
   "ts": "2026-09-05T04:39:45.454Z",
   "subscribers": 12568,
   "source": 4
  },
  {
   "ts": "2026-09-08T12:59:49.370Z",
   "subscribers": 12549,
   "source": 4
  },
  {
   "ts": "2026-09-11T06:37:22.953Z",
   "subscribers": 12533,
   "source": 4
  }
 ]
}