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. 12 shown for “Curtiss Aircraft Company” — 64 records examined, 34 dropped by the rights gate.
Archives queried 2026-09-10 18:29 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Photograph of airmail pilot James DeWitt Hill
Artist not stated in the record · c. 1924
Curtiss P-40E Warhawk (Kittyhawk IA)
Curtiss Aircraft Company · 1939
Curtiss JN-4D Jenny
Curtiss Aeroplane Company · 1917-1925
Curtiss R3C-2
Curtiss Aeroplane and Motor Co.,Garden City, Long Island, N.Y. · 1925
Curtiss N-9H
Curtiss Aeroplane Company · 1916-1927
Curtiss D-III Headless Pusher
Curtiss Aeroplane and Motor Company · 1912
Curtiss Model E Flying Boat (hull only)
Curtiss Aeroplane Company · 1913
Fokker T-2
Fokker (N. V. Nederlandsche Vliegtuigenfabriek) · 1923
Roberts 4X, In-line 4 Engine
Roberts Motor Company (Sandusky, Ohio) · 1911
Travel Air D4D
Travel Air Company · 1929-2000
Curtiss 1A "Gulfhawk"
Curtiss Airplane Co. · ca. 1929
Curtiss-Wright CW-1 Junior
Curtiss Aeroplane Company · 1930-1932
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. 79 matched · 24 examined · 24 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.0 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 67935 matched · 40 examined · 10 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 2026-09-10 18:29 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.