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 type II on advertising cover” — 64 records examined, 3 dropped by the rights gate.
Archives queried 2026-09-04 02:30 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Saint John on Patmos
Hans Baldung (called Hans Baldung Grien) · ca. 1511
1c Franklin type II on advertising cover
Artist not stated in the record · July 11, 1857
The Rehearsal of the Ballet Onstage
Edgar Degas · ca. 1874
New York Carrier cancel cover
Artist not stated in the record · c. 1855
Circus Sideshow (Parade de cirque)
Georges Seurat · 1887–88
1c Franklin Glastonbury, CT precancel cover
Artist not stated in the record · 1879-1880
The Death of Socrates
Jacques Louis David · 1787
1c Franklin and 2c Jackson on cover
Artist not stated in the record · 1863-1867
Oedipus and the Sphinx
Gustave Moreau · 1864
1c Franklin and 2c Andrew Jackson War Department combination cover
Artist not stated in the record · December 6, 1878
Virgin and Child
Dieric Bouts · ca. 1455–60
1c Franklin single on circular
National Bank Note Company · August 17, 1861
Longcase astronomical regulator
Ferdinand Berthoud · ca. 1768–70
1c Franklin strip of three on cover
Artist not stated in the record · 1863
The Crucifixion; The Last Judgment
Jan van Eyck · ca. 1436–38
1c Franklin Type II single
Toppan, Carpenter, Casilear and Company · July 1, 1851
The Marriage Feast at Cana
Juan de Flandes · ca. 1497
1c Franklin with New York Carrier cancel cover
Artist not stated in the record · c. 1852
Ewer (Suichū) with Cherry Blossoms and Picnic Curtain
Artist not stated in the record · early 17th century
1c Franklin and 3c Washington with USPO Despatch carrier cancel on cover
Artist not stated in the record · c. 1851
Mezzetin
Antoine Watteau · ca. 1718–20
1c Franklin Chicago Perforation single on cover
Artist not stated in the record · 1856
Dragon-Handled Jug with Inscription
Artist not stated in the record · early 16th century
1c Franklin type II 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. 260 matched · 24 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. 7366637 matched · 40 examined · 2 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 2026-09-04 02:30 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.