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. 21 shown for “Lefferts, Marshall C.” — 64 records examined, 33 dropped by the rights gate.
Archives queried 2026-09-05 21:40 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Milk Pot
John C. Moore · 1850
Patent model for printing on pyroxyline compounds (celluloid)
Lefferts, Marshall C. · ca 1886
Sugar Bowl
John C. Moore · 1850
Patent model for printing or decorating the surface of celluloid
Artist not stated in the record · ca 1886
Teakettle
John C. Moore · 1850
C. Corley
Artist not stated in the record · c. 1860-70
Hand Cannon
Kazuki Nobumichi · barrel late 18th–early 19th century; stock, dated 1865
Marshall Lefferts
Artist not stated in the record · c. 1860-70
Fragment
Artist not stated in the record · 17th century
Marshall Lefferts
Artist not stated in the record · c. 1860-70
The Backgammon Players
Philip Webb · 1861
Marshall Lefferts
Artist not stated in the record · c. 1860-70
Silhouette Portrait of John Marshall
William Henry Brown · 1844
Marshall Lefferts
Artist not stated in the record · c. 1860-70
Ensemble
Artist not stated in the record · ca. 1840
Marshall Lefferts
Artist not stated in the record · c. 1860-70
Tumbler
Denis Colombier · 1789
Marshall Lefferts
Artist not stated in the record · c. 1860-70
Marshall Lefferts
Artist not stated in the record · c. 1860-70
Marshall Lefferts
Artist not stated in the record · c. 1860-70
Marshall Lefferts
Artist not stated in the record · c. 1860-70
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. 311 matched · 24 examined · 15 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.9 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 1009026 matched · 40 examined · 18 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 2026-09-05 21:40 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.