{"@context":{"prov":"http://www.w3.org/ns/prov#","schema":"https://schema.org/"},"id":"https://www.spendledger.org/trust/chi/provenance.json","humanReadable":"https://www.spendledger.org/trust/chi","dataset":{"type":["schema:Dataset","prov:Entity"],"name":"Chicago state vendor payments (SpendLedger)","dataVersion":"2026-07-20 04:12:03.716571+00","coverage":{"max_date":"2025-12-31","min_date":"2022-01-03","payments":266585,"fiscal_years":[2022,2023,2024,2025]}},"source":{"type":"prov:Entity","name":"Chicago Checkbook (data.cityofchicago.org)","url":"https://data.cityofchicago.org/d/s4vu-giwb","role":"official government transparency portal; system of record"},"collection":{"type":"prov:Activity","method":"official bulk download","archival":"raw records stored as received, append-only, SHA-256 fingerprinted","normalization":"deterministic rules only; original names preserved; no fuzzy matching, no imputation"},"qaGates":[{"name":"Extraction integrity","result":"Published payment facts re-derived from the raw archive match to the penny: identical row counts and dollar sums."},{"name":"No orphan payments","result":"Every payment resolves to a vendor and an agency record. Zero orphans."},{"name":"Duplicate handling","result":"Identical rows in the city's data are real duplicate payments (for example pension-cap check batches) and are preserved, not deduplicated."},{"name":"Portal reconciliation","result":"Our raw read matches the portal's own published row count exactly at snapshot time (details below)."}],"reconciliation":{"period":"full payment-detail dataset","portal":{"label":"City of Chicago data portal, payment dataset row count at snapshot","url":"https://data.cityofchicago.org/d/s4vu-giwb"},"portalFigure":"446146","capturedOn":"2026-07-18","adjustments":[],"comparableFigure":"446146","ourFigure":"446146","gapPct":"0.000","tolerancePct":"0.0","passes":true,"unit":"records"},"caveats":["Chicago's fiscal year is the calendar year, unlike the July-through-June fiscal years of our state sources; fiscal year 2025 here means January through December 2025.","Payment-level detail begins in 2022: the city's portal progressively replaces older payment detail with summary rollups, so earlier years cannot be published at payment grain. Our archive preserves the detail from 2022 onward even after the city's portal thins it.","Row counts reflect the detail the city's portal still carried at snapshot time; the city removes detail over time, so the portal's own count can shrink between our fetches while our archive does not.","Fiscal year 2026 records are loaded in our archive but not yet published on this site until the city's year closes.","Payments to 15,553 individual people are withheld by name for privacy, because Chicago publishes personal names unmasked; their dollars remain in agency totals.","Some payments carry no department in the city's data; they are grouped under an unknown-department bucket so their dollars stay visible in totals.","A dollar-level comparison against the city's own published spending totals is pending capture and will appear on this page once recorded."],"sourceRequiredDisclaimer":"This site provides applications using data that has been modified for use from its original source, www.cityofchicago.org, the official website of the City of Chicago. The City of Chicago makes no claims as to the content, accuracy, timeliness, or completeness of any of the data provided at this site. The data provided at this site is subject to change at any time. It is understood that the data provided at this site is being used at one’s own risk.","reportReviewed":"2026-07-19"}