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 John C. Calhoun single” — 64 records examined, 3 dropped by the rights gate.
Archives queried 2026-08-28 12:15 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
The Penitence of Saint Jerome
Joachim Patinir · ca. 1515
1c John C. Calhoun single
Artist not stated in the record · 1862
Beaker with birds and animals
Artist not stated in the record · ca. 4th century BCE
1c John C. Calhoun CSA single
Thomas De La Rue & Co., Ltd. · c. 1862
St. John the Evangelist
Capodimonte Porcelain Manufactory · ca. 1744
1c John C. Calhoun block of four
Thomas De La Rue & Co., Ltd. · 1862
The Annunciation to Zacharias; (verso) The Angel of the Annunciation
Giovanni di Paolo (Giovanni di Paolo di Grazia) · ca. 1455–60
1c Franklin with New York Carrier cancel cover
Artist not stated in the record · c. 1852
The Crucifixion with Saints and a Donor
Joos van Cleve · ca. 1520
John C. Calhoun
E. B. & E. C. Kellogg Lithography Company, active c. 1842 - 1867 · 1844
The Denial of Saint Peter
Caravaggio (Michelangelo Merisi) · 1610
John C. Calhoun
E. B. & E. C. Kellogg Lithography Company, active c. 1842 - 1867 · 1844
The Holy Family with the Infant Saint John the Baptist
Perino del Vaga (Pietro Buonaccorsi) · ca. 1524–26
1c Washington single line watermark single
Artist not stated in the record · 1912
The Gallery of Illustrious Americans, Containing the Portraits and Biographical Sketches of Twenty-four of the Most Eminent Citizens of the American Republic Since the Death of Washington
Brady, D'Avignon and Company · 1850
John C. Calhoun
Unidentified Artist · c. 1855 (after c. 1845 daguerreotype)
Saint Lawrence Enthroned with Saints and Donors
Fra Filippo Lippi · 1440s
John C. Calhoun
Francis D'Avignon, 29 Oct 1813 - c. 1871 · 1850
Six Jewel Rivers
Sakai Ōho · ca. 1839
1c Washington single line watermark single
Artist not stated in the record · September 5, 1914
The Last Supper
Netherlandish (Antwerp Mannerist) Painters · 1515–20
John C. Calhoun
James Barton Longacre, 11 Aug 1794 - 1 Jan 1869 · c. 1834
The Life of the Virgin
Adriaen Isenbrant · after 1521
John C. Calhoun
Peter Kramer, 1823 - 1907 · c. 1850
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. 487 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. 1234280 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 2026-08-28 12:15 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.