{
 "meta": {
  "dataset": "Subscriber history — @open_letters",
  "channel": "https://tgregister.com/channel/open_letters",
  "retrieved_at": "2026-08-17T21:27:04.879Z",
  "licence": "CC BY 4.0 — attribute to tgregister.com",
  "n_readings": 12,
  "window": {
   "from": "2026-08-06T00:55:51.117Z",
   "to": "2026-08-17T18:57:58.702Z"
  },
  "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": "2026-08-06T00:55:51.117Z",
   "subscribers": 41505,
   "source": 0
  },
  {
   "ts": "2026-08-06T01:48:24.697Z",
   "subscribers": 41505,
   "source": 3
  },
  {
   "ts": "2026-08-06T17:00:32.125Z",
   "subscribers": 41504,
   "source": 4
  },
  {
   "ts": "2026-08-08T16:05:34.683Z",
   "subscribers": 41503,
   "source": 4
  },
  {
   "ts": "2026-08-09T17:01:51.043Z",
   "subscribers": 41499,
   "source": 4
  },
  {
   "ts": "2026-08-10T15:46:49.257Z",
   "subscribers": 41492,
   "source": 4
  },
  {
   "ts": "2026-08-11T16:28:13.057Z",
   "subscribers": 41481,
   "source": 4
  },
  {
   "ts": "2026-08-12T14:15:31.477Z",
   "subscribers": 41470,
   "source": 4
  },
  {
   "ts": "2026-08-13T13:04:57.704Z",
   "subscribers": 41466,
   "source": 4
  },
  {
   "ts": "2026-08-14T21:47:58.527Z",
   "subscribers": 41455,
   "source": 4
  },
  {
   "ts": "2026-08-16T13:47:00.046Z",
   "subscribers": 41439,
   "source": 4
  },
  {
   "ts": "2026-08-17T18:57:58.702Z",
   "subscribers": 41429,
   "source": 4
  }
 ]
}