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 “1c Franklin Chicago Perforation single on cover” — 64 records examined, 7 dropped by the rights gate.
Archives queried 2026-09-01 03:48 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Tupu (pin)
Inca artist(s) · 1400–1535 CE
1c Franklin Chicago Perforation single on cover
Artist not stated in the record · 1856
Shield cover
Chimú artist(s) · 1350–1470 CE
1c Franklin type I single
Artist not stated in the record · 1861
The Death of Socrates
Jacques Louis David · 1787
1c Franklin type III single
Toppan, Carpenter, Casilear and Company · 1857
The House with the Cracked Walls
Paul Cézanne · 1892–94
1c Franklin Type IV single
Toppan, Carpenter and Company · 1857-1861
The Crucifixion; The Last Judgment
Jan van Eyck · ca. 1436–38
1c Franklin single
Toppan, Carpenter, Casilear and Company · 1861
The Card Players
Paul Cézanne · 1890–92
1c Franklin single on circular
National Bank Note Company · August 17, 1861
Circus Sideshow (Parade de cirque)
Georges Seurat · 1887–88
1c Franklin with New York Carrier cancel cover
Artist not stated in the record · c. 1852
Autumn Landscape with a Flock of Turkeys
Jean-François Millet · 1872–73
New York Carrier cancel cover
Artist not stated in the record · c. 1855
Hermann von Wedigh III (died 1560)
Hans Holbein the Younger · 1532
1c USPO Despatch carrier stamp on cover
Artist not stated in the record · c. 1851
Oedipus and the Sphinx
Gustave Moreau · 1864
1c Franklin type Ic single
Artist not stated in the record · 1851
The Rehearsal of the Ballet Onstage
Edgar Degas · ca. 1874
1c Franklin type IV single
Toppan, Carpenter, Casilear and Company · 1852
Blind Orion Searching for the Rising Sun
Nicolas Poussin · 1658
1c Franklin type I single
Artist not stated in the record · 1851
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. 88 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. 1024568 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 2026-09-01 03:48 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.