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. 19 shown for “Viola pratincola Greene” — 48 records examined, 6 dropped by the rights gate.
Archives queried 2026-09-02 22:51 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
The Musician
Bartholomeus van der Helst · 1662
Viola pratincola Greene
Artist not stated in the record · 2 Jun 1915
Plate
Laurent Cars · 1738–49
Viola pratincola Greene
Artist not stated in the record · 23 Jul 1924
Book of Flower Studies
Master of Claude de France · ca. 1510–1515
Viola pratincola Greene
Artist not stated in the record · 5 Jul 1899
Venus and the Lute Player
Titian · ca. 1565–70
Viola pratincola Greene
Artist not stated in the record · 23 May 1908 to 6 Jul 1908
Woman Playing the Violin, Seen from the Back
Louis de Carmontelle · ca. 1758–59
Viola pratincola Greene
Artist not stated in the record · 9 Jun 1905 to 17 Jul 1905
Woman Playing the Violin, Seen from the Front
Louis de Carmontelle · ca. 1758–59
Viola pratincola Greene
Artist not stated in the record · 11 Apr 1936
Lady Rich (Elizabeth Jenks, died 1558)
Hans Holbein the Younger · ca. 1540
Viola pratincola Greene
Artist not stated in the record · 19 May 1911 to 23 Jun 1911
Viola pratincola Greene
Artist not stated in the record · 18 May 1924
Viola pratincola Greene
Artist not stated in the record · 27 May 1924
Viola pratincola Greene
Artist not stated in the record · 19 Jul 1924
Viola pratincola Greene
Artist not stated in the record · Transcribed d/m/y: 19/6/21
Viola pratincola Greene
Artist not stated in the record · 18 Jun 1921
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. 8 matched · 8 examined · 1 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.7 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 105023 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 2026-09-02 22:51 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.