{
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      "id": "S1",
      "title": "NYSE Daily TAQ public trade sample, 1 July 2026",
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      "title": "NYSE Daily TAQ security master, 1 July 2026",
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      "role": "Exact Symbol to SIP_Symbol mapping, test flag, security type, listing and share unit",
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      "url": "https://www.nyse.com/publicdocs/nyse/data/Daily_TAQ_Client_Spec_v4.0.pdf",
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      "title": "NYSE Daily TAQ Client Specification v4.1, 25 April 2024",
      "url": "https://www.nyse.com/publicdocs/nyse/data/Daily_TAQ_Client_Spec_v4.1.pdf",
      "role": "Eastern time, file trailer, trade corrections and symbol mapping; actual 2026 fields were inspected",
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      "title": "CTA CTS Output Specification v2.11b, 29 January 2026",
      "url": "https://www.ctaplan.com/publicdocs/ctaplan/CTS_Pillar_Output_Specification.pdf",
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    },
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      "id": "S9",
      "title": "Cboe Equity & ETF Quotes sample",
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      "role": "Supplementary 27 IWM 15-minute records, 1 June 2016",
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      "title": "NYSE Daily TAQ product page",
      "url": "https://www.nyse.com/data-products/catalog/daily-taq",
      "role": "Reference product scope",
      "accessed": "2026-10-22"
    },
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      "id": "S12",
      "title": "NYSE market data policies and licensing documents",
      "url": "https://www.nyse.com/market-data/pricing-policies-contracts-guidelines",
      "role": "Public access is not treated as a redistribution license",
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    "verification": "Read every identified archive to EOF; verify full uncompressed bytes and SHA-256 against immutable published manifest; ASCII, row width and monotonic timestamp/date checks. Only selected dates are compared."
  },
  "access_note": "Raw third-party trades, licensed HDN records and credentials are not bundled."
}