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 “Congressional Free Frank cover” — 63 records examined, 4 dropped by the rights gate.
Archives queried 2026-09-01 13:18 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 Rest on the Flight into Egypt
Gerard David · ca. 1512–15
Congressional Free Frank cover
Artist not stated in the record · February 6, 1961
Mademoiselle V. . . in the Costume of an Espada
Edouard Manet · 1862
Congressional Free Frank cover
Artist not stated in the record · November 21
The Wedding of Stephen Beckingham and Mary Cox
William Hogarth · 1729
Congressional Free Frank cover
Artist not stated in the record · September 8
The Birth of the Virgin
Fra Carnevale (Bartolomeo di Giovanni Corradini) · 1467
Congressional Free Frank cover
Artist not stated in the record · August 3.1871
Portrait of a Man, Possibly a Self-Portrait
Velázquez (Diego Rodríguez de Silva y Velázquez) · ca. 1635
Stampless Cover
Artist not stated in the record · c. 1858
Mirror clock
Master CR · ca. 1565–70
Stampless Cover
Artist not stated in the record · c. 1814
The Sacrifice of Polyxena
Charles Le Brun · 1647
Stampless Cover
Artist not stated in the record · 1855
Juan de Pareja (ca. 1608–1670)
Velázquez (Diego Rodríguez de Silva y Velázquez) · 1650
Stampless Cover
Artist not stated in the record · 1845
Valentine with Cobweb
Anonymous · 1841
World War I postcard with “nurse’s mail” frank
Artist not stated in the record · 1918
Cobweb Valentine with Morning Glory
Anonymous, British, 19th century · 1840
Free Frank cover
Artist not stated in the record · June 10
Boating
Edouard Manet · 1874
Free Frank cover
Artist not stated in the record · 1862
The Crucifixion; The Last Judgment
Jan van Eyck · ca. 1436–38
Free Frank cover
Artist not stated in the record · July 10, 1913
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. 23 matched · 23 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. 87843 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 13:18 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.