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 “British Free Frank folded letter” — 64 records examined, 2 dropped by the rights gate.
Archives queried 2026-09-01 01:48 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
The Crucifixion; The Last Judgment
Jan van Eyck · ca. 1436–38
British Free Frank folded letter
Artist not stated in the record · 1830
The Rest on the Flight into Egypt
Gerard David · ca. 1512–15
British Free Frank folded letter
Artist not stated in the record · December 9, 1829
Whalers
Joseph Mallord William Turner · ca. 1845
British Free Frank cover scrap
Artist not stated in the record · 1831
Virgin and Child with Saints Catherine of Alexandria and Barbara
Hans Memling · early 1480s
Free frank cover and folded letter
Artist not stated in the record · May 15, 1848
Portrait of a Man, Possibly a Self-Portrait
Velázquez (Diego Rodríguez de Silva y Velázquez) · ca. 1635
Benjamin Franklin to Mary Hopkinson free franked “B Free Franklin” folded letter
Artist not stated in the record · May 9, 1766
The Adoration of the Magi
Quinten Massys · 1526
Letter enclosed in Benjamin Franklin free frank cover
Artist not stated in the record · April 13, 1765
The Baptism of Christ
Sebastiano Ricci · ca. 1713–14
Stampless Cover
Artist not stated in the record · c. 1836
Juan de Pareja (ca. 1608–1670)
Velázquez (Diego Rodríguez de Silva y Velázquez) · 1650
Benjamin Franklin free frank cover
Artist not stated in the record · April 13, 1765
The Birth of the Virgin
Fra Carnevale (Bartolomeo di Giovanni Corradini) · 1467
Letter to Postmaster Dudley Woodbridge from Surveyor General Ebenezer Hazard
Artist not stated in the record · April 6, 1781
Portrait of a Man
Quinten Massys
British Free Frank cover scrap
Artist not stated in the record · 1835
Abner's Messenger before David; The Queen of Sheba Bringing Gifts to Solomon; The Annunciation
Master of the Saint Barbara Legend · ca. 1480
George Washington to Anne Louise DuBarry franked "President U.S." folded letter
Artist not stated in the record · August 1796
Francesco Sassetti (1421–1490) and His Son Teodoro
Domenico Ghirlandaio (Domenico Bigordi) · ca. 1488
37.5c double War of 1812 letter rate for 90-150 miles forwarded stampless cover
Artist not stated in the record · 1815
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. 27 matched · 24 examined · 0 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. 141167 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 2026-09-01 01:48 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.