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 “Zostera marina L.” — 64 records examined, 15 dropped by the rights gate.
Archives queried 2026-09-04 12:34 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Pope Benedict XIV (Prospero Lambertini, 1675–1758)
Pierre Hubert Subleyras · 1746
Zostera marina L.
Artist not stated in the record · Jul 1890
Monumental vase
Pierre Philippe Thomire · lapidary work: early 19th century; pedestal and mounts: 1819
Zostera marina L. var. marina
Artist not stated in the record · 30 Aug 1923
Fantastic Landscape
Francesco Guardi · ca. 1765
Zostera marina L. var. marina
Artist not stated in the record · 1 Jul 1923
Set of jewelry
Artist not stated in the record · early 5th century BCE
Zostera marina L. var. marina
Artist not stated in the record · 19 Jun 1921
The "Kearsarge" at Boulogne
Edouard Manet · 1864
Zostera marina L. var. marina
Artist not stated in the record · 11 Aug 1921
Circus Sideshow (Parade de cirque)
Georges Seurat · 1887–88
Zostera marina L. var. marina
Artist not stated in the record · 18 Jul 1923
Blessing Bishop (Saint Nicholas of Bari)
Artist not stated in the record · ca. 1350–75
Zostera marina L. var. marina
Artist not stated in the record · 21 Jun 1922
Saint Lucy and Her Mother at the Shrine of Saint Agatha; Saint Lucy Giving Alms; Saint Lucy before Paschasius; Saint Lucy Resisting Efforts to Move Her
Giovanni di Bartolommeo Cristiani
Zostera marina L. var. marina
Artist not stated in the record · 15 Dec 1920
Bandits on a Rocky Coast
Salvator Rosa · 1655–60
Zostera marina L. var. marina
Artist not stated in the record · 25 Jun 1921
Zostera marina L. var. marina
Artist not stated in the record · 18 Jul 1921
Zostera marina L. var. marina
Artist not stated in the record · 14 Mar 1922
Zostera marina L. var. marina
Artist not stated in the record · 8 Jan 1922
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. 103 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. 1293772 matched · 40 examined · 0 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 2026-09-04 12:34 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.