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 “Derby Porcelain Factory, English, established 1756” — 64 records examined, 19 dropped by the rights gate.
Archives queried 2026-08-28 20:27 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Drop-front desk (secrétaire à abattant or secrétaire en cabinet)
Martin Carlin · ca. 1773
Platter (One of a Pair)
Derby Porcelain Factory, English, established 1756 · ca. 1784–1806
"Alhambra" vase with lid
Crown Derby · 1877–90
Platter (One of a Pair)
Derby Porcelain Factory, English, established 1756 · ca. 1784–1806
"Alhambra" vase with lid
Crown Derby · 1880s
Figural Group of Cupids Fishing Representing Water, from a Group Called "The Elements" (One of a Pair)
Derby Porcelain Factory, English, established 1756 · ca. 1790–1795
Two wall sconces (Bras de cheminée)
Jean-Claude Duplessis · ca. 1761
Figural Group of Cupids Representing Air, from a Group Called "The Elements" (One of a Pair)
Derby Porcelain Factory, English, established 1756 · ca. 1790–1795
Vase (vase gothique Fragonard) (one of a pair)
Alexandre Evariste Fragonard · manufactured 1832, decorated 1844
Platter with Birds (One of a Pair)
Derby Porcelain Factory, English, established 1756 · ca. 1760
Potpourri vase (pot-pourri gondole)
Sèvres Manufactory · 1757
Platter with Birds (One of a Pair)
Derby Porcelain Factory, English, established 1756 · ca. 1760
Plate
Imperial Porcelain Manufactory, St. Petersburg · 1755–60
Figure of a Female "Ranelagh" Dancer (One of a Pair)
Derby Porcelain Factory, English, established 1756 · ca. 1765
Bottle cooler from the Louis XV service (seau à bouteille)
Vincennes Manufactory · 1754
Figure of a Male "Ranelagh" Dancer (One of a Pair)
Derby Porcelain Factory, English, established 1756 · ca. 1765
Chinese musicians
Chelsea Porcelain Manufactory · ca. 1755
Plate Depicting the Sèvres Porcelain Manufactory
Sèvres Porcelain Manufactory, French, established 1756 · ca. 1822
Mantel clock (pendule de chiminée)
Paul Gudin Le Jeune · clock ca. 1750, figures decorated ca. 1737/38
Sugar Bowl, from the Duc d'Orléans Service
Tournai Porcelain Factory, Belgian, established ca. 1750 · 1787–1792
Vase with handles
Crown Derby · 1885
Custard Cup
Tournai Porcelain Factory, Belgian, established ca. 1750 · mid- 18th–18th century
Vase with hexagonal foot (one of a pair)
Crown Derby · 1885
Plate
Zurich Pottery and Porcelain Factory, Swiss, established 1763 · ca. 1770–1780
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. 65 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. 26439 matched · 40 examined · 19 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 2026-08-28 20:27 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.