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 “Transatlantic cover to Boston” — 64 records examined, 5 dropped by the rights gate.
Archives queried 2026-08-31 21:25 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Royal American Magazine, or Universal Repository of Instruction and Amusement, Vol. I
Isaiah Thomas · January–December 1774
Transatlantic cover to Boston
Artist not stated in the record · 1857
Tea Urn
Paul Revere Jr. · 1791
Transatlantic cover to Boston
Artist not stated in the record · August 29, 1851
Pipe Organ
Thomas Appleton · 1830
Transatlantic Cover to Boston
Artist not stated in the record · 1867
Sugar bowl
New England Glass Company · 1815–35
Transatlantic cover to Madrid, Spain
Artist not stated in the record · December 18, 1876
Teapot
John Coney · 1710–22
Transatlantic cover to London
Artist not stated in the record · September 7, 1858
Cream pitcher
New England Glass Company · 1815–35
Transatlantic cover to France
Artist not stated in the record · June 17, 1856
Inkstand
John Coney · 1710–20
Letter from inside Charles Lindbergh transatlantic flight cover
Artist not stated in the record · May 16, 1927
The Agony in the Garden
Raphael (Raffaello Sanzio or Santi) · ca. 1504
2c Andrew Jackson pair on transatlantic cover
Artist not stated in the record · June 18, 1875
Square Piano
Alpheus Babcock · 1822–24
Transatlantic Cover to Nagasaki, Japan
Artist not stated in the record · 1867
Sugar Bowl
Paul Revere Jr. · ca. 1795
Transatlantic Cover to New York
Artist not stated in the record · 1847
The Gulf Stream
Winslow Homer · 1899; reworked by 1906
Cover carried aboard Lindbergh's transatlantic flight
Artist not stated in the record · May 20, 1927
A Hunting Scene
Piero di Cosimo (Piero di Lorenzo di Piero d'Antonio) · ca. 1494–1500
Transatlantic cover to Florence, Italy
Artist not stated in the record · December 17, 1863
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. 627 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. 942598 matched · 40 examined · 5 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 2026-08-31 21:25 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.