{
 "meta": {
  "dataset": "Subscriber history — @HVACengineerQualification",
  "channel": "https://tgregister.com/channel/HVACengineerQualification",
  "retrieved_at": "2026-09-11T14:53:47.980Z",
  "licence": "CC BY 4.0 — attribute to tgregister.com",
  "n_readings": 25,
  "window": {
   "from": "2026-08-07T12:01:01.146Z",
   "to": "2026-09-11T00:18:56.637Z"
  },
  "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": "2026-08-07T12:01:01.146Z",
   "subscribers": 13865,
   "source": 0
  },
  {
   "ts": "2026-08-07T18:08:59.536Z",
   "subscribers": 13866,
   "source": 4
  },
  {
   "ts": "2026-08-10T10:17:59.910Z",
   "subscribers": 13870,
   "source": 4
  },
  {
   "ts": "2026-08-11T08:32:37.621Z",
   "subscribers": 13875,
   "source": 4
  },
  {
   "ts": "2026-08-12T09:45:07.525Z",
   "subscribers": 13869,
   "source": 4
  },
  {
   "ts": "2026-08-13T09:47:08.439Z",
   "subscribers": 13867,
   "source": 4
  },
  {
   "ts": "2026-08-14T21:05:27.413Z",
   "subscribers": 13869,
   "source": 4
  },
  {
   "ts": "2026-08-16T08:12:35.769Z",
   "subscribers": 13874,
   "source": 4
  },
  {
   "ts": "2026-08-17T14:14:58.277Z",
   "subscribers": 13871,
   "source": 4
  },
  {
   "ts": "2026-08-18T16:27:36.442Z",
   "subscribers": 13863,
   "source": 4
  },
  {
   "ts": "2026-08-19T16:12:48.749Z",
   "subscribers": 13870,
   "source": 4
  },
  {
   "ts": "2026-08-19T17:58:42.934Z",
   "subscribers": 13870,
   "source": 1
  },
  {
   "ts": "2026-08-25T14:24:53.179Z",
   "subscribers": 13866,
   "source": 4
  },
  {
   "ts": "2026-08-26T11:32:38.178Z",
   "subscribers": 13869,
   "source": 4
  },
  {
   "ts": "2026-08-27T13:07:09.322Z",
   "subscribers": 13864,
   "source": 4
  },
  {
   "ts": "2026-08-28T10:56:41.010Z",
   "subscribers": 13863,
   "source": 4
  },
  {
   "ts": "2026-08-29T08:13:07.571Z",
   "subscribers": 13865,
   "source": 4
  },
  {
   "ts": "2026-08-30T04:38:59.438Z",
   "subscribers": 13867,
   "source": 4
  },
  {
   "ts": "2026-08-31T02:06:45.428Z",
   "subscribers": 13870,
   "source": 4
  },
  {
   "ts": "2026-09-01T03:03:55.409Z",
   "subscribers": 13868,
   "source": 4
  },
  {
   "ts": "2026-09-02T01:45:43.816Z",
   "subscribers": 13872,
   "source": 4
  },
  {
   "ts": "2026-09-03T05:58:04.283Z",
   "subscribers": 13869,
   "source": 4
  },
  {
   "ts": "2026-09-04T22:59:12.501Z",
   "subscribers": 13873,
   "source": 4
  },
  {
   "ts": "2026-09-08T01:57:16.621Z",
   "subscribers": 13878,
   "source": 4
  },
  {
   "ts": "2026-09-11T00:18:56.637Z",
   "subscribers": 13883,
   "source": 4
  }
 ]
}