OpenTwo archives, queried live.
Every record below comes from The Met or Smithsonian Open Access and was filtered on that archive’s own rights field before it reached this page. 20 shown for “Pump for the Iron Lung Invented by C. E. H. Armbruster” — 61 records examined, 33 dropped by the rights gate.
Archives queried 2026-09-05 23:47 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Game table
David Roentgen · ca. 1780–83
Pump for the Iron Lung Invented by C. E. H. Armbruster
Artist not stated in the record · 1916-02-22
Crossbow of Count Ulrich V of Württemberg (1413–1480)
Heinrich Heid von Winterthur · dated 1460
Chest Portion of an Iron Lung
Artist not stated in the record
Madonna and Child
Simone Martini · ca. 1326
Corliss’ Patent Model of a Steam Pump - 1876
Artist not stated in the record · 1877
Saint Andrew
Simone Martini · ca. 1326
Worthington Direct-Acting Steam Pump, Patent Model
Artist not stated in the record · 1855
Cubiculum (bedroom) from the Villa of P. Fannius Synistor at Boscoreale
Artist not stated in the record · ca. 50–40 BCE
Cameron Pump Valves, Patent Model
Artist not stated in the record · 1874
Madame Georges Charpentier (Marguerite-Louise Lemonnier, 1848–1904) and Her Children, Georgette-Berthe (1872–1945) and Paul-Emile-Charles (1875–1895)
Auguste Renoir · 1878
Clow Rotary Water Pump, Patent Model
Artist not stated in the record · 1856
View of Toledo
El Greco (Domenikos Theotokopoulos) · ca. 1599–1600
Bevil Wind Mill Patent Model
Artist not stated in the record · 1880
A Woman Seated beside a Vase of Flowers (Madame Paul Valpinçon?)
Edgar Degas · 1865
Knowles Steam Pump, Patent Model
Artist not stated in the record · 1879
Shield of Henry II of France (reigned 1547–59)
Artist not stated in the record · ca. 1555
Watch with scenes from the story of Rebekah at the well
Johannes van Ceulen · ca. 1676–80
Gold-inlaid Colt Model 1851 Navy Revolver (serial no. 20133), with Case and Accessories
Samuel Colt · ca. 1853
Pair of Flintlock Pistols of the Prince of Wales, later George IV (1762–1830), with Case and Accessories
Durs Egg · hallmarked for 1787–88
Where these records came from.
Two archives are wired, and only two. Each one is filtered on its own rights field — never on a title match, and never on the presence of an image file.
- The Met Collection API (Open Access)Rights field:
isPublicDomain. 21 matched · 21 examined · 1 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.12 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 3701145 matched · 40 examined · 32 dropped by the rights gate. Kept only where metadata_usage.access === "CC0" and an image resource was published.8 shown
These figures describe the pass run at 2026-09-05 23:47 UTC, during this request. A completed pass is kept for 24 hours and replayed for an identical search, which is what keeps repeated queries inside Smithsonian’s 30-requests-per-hour allowance. A pass in which either archive failed to answer is never kept — an outage must not be replayed as though it were a finding about the catalogue.
Wikimedia Commons and the Library of Congress are deliberately not wired. Wikimedia was confirmed, on a live query, to return CC-BY material inside the same result set as genuine public domain works, and filtering it safely has not been designed yet. loc.gov was blocked by bot detection during the source evaluation, so its rights vocabulary has never been observed — and nothing here is built on a field nobody has read.
An image file is a rights claim. It never travels without its field.