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. 24 shown for “3c Washington single on cover” — 64 records examined, 4 dropped by the rights gate.
Archives queried 2026-08-31 23:03 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Head of a solar deity
Maya artist(s) · 600–900 CE
3c Washington single on cover
National Bank Note Company · 1861
The Life of the Virgin
Adriaen Isenbrant · after 1521
3c Washington single on cover
Artist not stated in the record · 1861
Ruins of Gallego Flour Mills, Richmond
Alexander Gardner · 1865
12c Washington bisect with 3c Washington single on cover
Artist not stated in the record · 1857-1861
Cover
Artist not stated in the record · 16th–17th century
3c Washington single on cover
Artist not stated in the record · 1861
Shield cover
Chimú artist(s) · 1350–1470 CE
3c Washington imprint single on cover
Artist not stated in the record · c. 1852
Saint John on Patmos
Hans Baldung (called Hans Baldung Grien) · ca. 1511
3c Washington single on Confederate cover
Artist not stated in the record · May 2, 1861
The Rest on the Flight into Egypt
Gerard David · ca. 1512–15
3c Washington Treasury Department cover
Artist not stated in the record · Aug 11, 1875
The Penitence of Saint Jerome
Joachim Patinir · ca. 1515
3c Washington Treasury Department cover front
Artist not stated in the record · 1873
Merry Company on a Terrace
Jan Steen · ca. 1670
1c USPO Despatch carrier stamp on cover
Artist not stated in the record · c. 1851
Khusrau and Shirin
Hatifi · dated 904 AH/1498–99 CE
6c Shanghai China surcharge on 3c Washington single
Artist not stated in the record · 1919
Boating
Edouard Manet · 1874
3c Washington on Union cover
Artist not stated in the record · 1862
The Crucifixion with Saints and a Donor
Joos van Cleve · ca. 1520
3c Washington D Grill cover
Artist not stated in the record · April 6, 1868
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. 889 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. 1124859 matched · 40 examined · 0 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 23:03 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.