{
 "meta": {
  "dataset": "Subscriber history — @costa_case_chat",
  "channel": "https://tgregister.com/channel/costa_case_chat",
  "retrieved_at": "2026-09-10T11:13:34.478Z",
  "licence": "CC BY 4.0 — attribute to tgregister.com",
  "n_readings": 10,
  "window": {
   "from": "2026-08-07T15:15:05.481Z",
   "to": "2026-09-09T09:17:45.670Z"
  },
  "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": "2026-08-07T15:15:05.481Z",
   "subscribers": 4617,
   "source": 0
  },
  {
   "ts": "2026-08-11T08:17:14.305Z",
   "subscribers": 4613,
   "source": 4
  },
  {
   "ts": "2026-08-14T20:14:18.901Z",
   "subscribers": 4611,
   "source": 4
  },
  {
   "ts": "2026-08-17T19:45:43.990Z",
   "subscribers": 4609,
   "source": 4
  },
  {
   "ts": "2026-08-24T15:28:34.443Z",
   "subscribers": 4613,
   "source": 4
  },
  {
   "ts": "2026-08-27T21:55:46.302Z",
   "subscribers": 4610,
   "source": 4
  },
  {
   "ts": "2026-08-31T03:36:41.378Z",
   "subscribers": 4608,
   "source": 4
  },
  {
   "ts": "2026-09-02T22:48:18.759Z",
   "subscribers": 4608,
   "source": 1
  },
  {
   "ts": "2026-09-03T21:20:13.029Z",
   "subscribers": 4604,
   "source": 4
  },
  {
   "ts": "2026-09-09T09:17:45.670Z",
   "subscribers": 4603,
   "source": 4
  }
 ]
}