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. 23 shown for “3c Washington Treasury Department cover front” — 64 records examined, 5 dropped by the rights gate.
Archives queried 2026-08-31 23:04 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Marble Portrait Bust of a Woman with a Scroll
Artist not stated in the record · late 4th–early 5th century
3c Washington Treasury Department cover front
Artist not stated in the record · 1873
The Emperor's Carpet
Artist not stated in the record · second half 16th century
3c Washington Treasury Department cover
Artist not stated in the record · Aug 11, 1875
Cover
Artist not stated in the record · 16th–17th century
3c Washington Treasury Department card plate proof
Artist not stated in the record · 1879-1894
Antoine Laurent Lavoisier (1743–1794) and Marie Anne Lavoisier (Marie Anne Pierrette Paulze, 1758–1836)
Jacques Louis David · 1788
3c Washington Treasury Department single
Artist not stated in the record · 1873
Shield cover
Chimú artist(s) · 1350–1470 CE
3c Washington plate proof single
Artist not stated in the record · 1873
The Crucifixion; The Last Judgment
Jan van Eyck · ca. 1436–38
Khusrau and Shirin
Hatifi · dated 904 AH/1498–99 CE
3c Washington on Union cover
Artist not stated in the record · 1862
The Interior of a Woman Painter's Studio
Marie Victoire Lemoine · 1789
3c Washington on Confederate Civil War Patriotic cover
Artist not stated in the record · 1861-1865
The Rest on the Flight into Egypt
Gerard David · ca. 1512–15
3c Washington on Confederate cover
Artist not stated in the record · May 25, 1861
The Penitence of Saint Jerome
Joachim Patinir · ca. 1515
3c Washington on Confederate cover
Artist not stated in the record · May 15, 1861
Sarcophagus of Harkhebit
Artist not stated in the record · 595–526 BCE
3c Washington D Grill cover
Artist not stated in the record · April 6, 1868
Armor
Artist not stated in the record · ca. 1400–1450 and later
3c Washington single on cover
Artist not stated in the record · 1861
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. 402 matched · 24 examined · 4 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. 632475 matched · 40 examined · 1 dropped by the rights gate. Kept only where metadata_usage.access === "CC0" and an image resource was published.12 shown
These figures describe the pass run at 2026-08-31 23:04 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.