{
  "total": 1,
  "source": "d1",
  "tracking_since": "2026-10-25T12:38:37.716Z",
  "source_rechecks": {
    "rows": 332,
    "series": 250,
    "last_checked_at": "2026-10-25T13:38:37.000Z",
    "latest_result_counts": {
      "confirmed": 240,
      "unreachable": 5,
      "needs_review": 4,
      "changed": 1
    },
    "method": "Each source URL is fetched and the recorded numbers are looked for in the page (PDFs via pdftotext); anything not confirmed is reviewed by a human. Log: /downloads/price_rechecks.jsonl"
  },
  "observations": [
    {
      "id": "po_20261025_45d9b1905bd8",
      "series_key": "ps_971ca5575c77a634",
      "kind": "provider_published",
      "use_case_id": null,
      "use_case_ids": [
        "indoor-drone-show",
        "drone-light-show",
        "drone-pilot-training",
        "drone-racing-events"
      ],
      "provider_id": "65drones",
      "description": "Indoor drone light show (small fleet)",
      "low": 3000,
      "high": 5800,
      "currency": "SGD",
      "unit": "per show",
      "region": "",
      "source_url": "https://www.65drones.com/pages/summary-of-drone-activities",
      "as_of": "2026-10",
      "observed_at": "2026-10-25T12:38:37.716Z",
      "content_hash": "sha256:45d9b1905bd8c8414c467e21b01b8818cb908793f091adcc8e364286c6543e5f",
      "supersedes": null,
      "origin": "backfill",
      "change_reason": null,
      "current": true,
      "usd": {
        "currency": "USD",
        "low": 2346,
        "high": 4537,
        "fx": {
          "pair": "SGD/USD",
          "rate": 0.782167,
          "sgd_per_usd": 1.2785,
          "rate_date": "2026-10-23",
          "source": "European Central Bank reference rates via Frankfurter",
          "source_url": "https://api.frankfurter.dev/v1/latest?base=USD"
        },
        "note": "Converted at the published reference rate on 2026-10-23, not at the price's as_of date. Indicative only."
      }
    }
  ],
  "series": [
    {
      "series_key": "ps_971ca5575c77a634",
      "kind": "provider_published",
      "use_case_id": null,
      "provider_id": "65drones",
      "description": "Indoor drone light show (small fleet)",
      "currency": "SGD",
      "unit": "per show",
      "region": "",
      "source_url": "https://www.65drones.com/pages/summary-of-drone-activities",
      "observations": 1,
      "first_observed_at": "2026-10-25T12:38:37.716Z",
      "last_observed_at": "2026-10-25T12:38:37.716Z",
      "current": true,
      "latest": {
        "low": 3000,
        "high": 5800,
        "as_of": "2026-10",
        "id": "po_20261025_45d9b1905bd8"
      },
      "trend": null,
      "last_rechecked": {
        "checked_at": "2026-10-25T13:26:35.985Z",
        "result": "confirmed",
        "by": "automatic"
      }
    }
  ],
  "note": "Only one observation per series so far: we started recording every price on 2026-10-25 and re-check every source on a schedule. A trend appears when a re-checked source shows a different price (we never overwrite old observations).",
  "pagination": {
    "total": 1,
    "limit": 200,
    "offset": 0,
    "returned": 1,
    "next_offset": null,
    "next": null,
    "prev": null
  },
  "license": "Whirrwork (https://whirrwork.com), CC BY 4.0"
}