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. 21 shown for “August T. A. Knochenhauer” — 64 records examined, 38 dropped by the rights gate.
Archives queried 2026-08-29 06:36 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term..jpg&w=3840&q=75)
Clarinet in F
August T. A. Knochenhauer · 1856
World War II Patriotic cover
Walter T. Poppenger · August 23, 1942
Raven rattle
Artist not stated in the record · 19th century
Neüe inventiones von unterschiedlich nützlicher Silber-arbeit...gezeichnet von Abraham Drentwet in Augspurg. Inss. Kupffer gebracht durch Ioh : August Corvinim, und dasselbst verlegt von Jeremias Wolff... ; title page
Abraham Drentwet, German, 1647 – 1727 · ca. 1725
Productions of the Leeds Photographic Society
T. Dixon · 1852
World War II Patriotic cover
Walter T. Poppenger · August 5, 1942
The Apotheosis of the Spanish Monarchy
Giovanni Battista Tiepolo · 1760s
J. T. Campbell Adding Machine
Campbell, J. T. · 1859
Benjamin Franklin (1706–1790)
Joseph Siffred Duplessis · 1778
Lidded ritual wine container (hu) with masks and dragons
Artist not stated in the record · ca. 13th century BCE
Springtime
Pierre-Auguste Cot · 1873
Helichrysum paniculatum (L.) A. Cunn.
Artist not stated in the record · 24 Sep 1930
Self-Portrait with Two Pupils, Marie Gabrielle Capet (1761–1818) and Marie Marguerite Carraux de Rosemond (1765–1788)
Adélaïde Labille-Guiard · 1785
Woven portrait of Napoleon III
Auguste Malpertuy, French, 1823–1897 · 1855
Column Statue of a King
Artist not stated in the record · ca. 1150–60
Senate Chamber, Harrisbug, Pennsylvannia
August Kollner, 1813–1850 · 1850
The Public Viewing David's "Coronation" at the Louvre
Louis Léopold Boilly · 1810
Dr. T. Holmes
Auguste Edouart, 1788 - 1861 · 1843
Cottage Children (The Wood Gatherers)
Thomas Gainsborough · 1787
A Woodland Road with Travelers
Jan Brueghel the Elder · 1607
Marble head of a Ptolemaic queen
Artist not stated in the record · ca. 270–250 BCE
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. 1870 matched · 24 examined · 7 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. 2073416 matched · 40 examined · 31 dropped by the rights gate. Kept only where metadata_usage.access === "CC0" and an image resource was published.9 shown
These figures describe the pass run at 2026-08-29 06:36 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.