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 “Ludwig Theodor Zöllner” — 64 records examined, 19 dropped by the rights gate.
Archives queried 2026-09-06 14:51 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Portrait of Maria Theresia, Queen of Saxony
Ludwig Theodor Zöllner · 1829
Llagunoa glandulosa (Hook. & Arn.) G. Don
Artist not stated in the record · 13 Sep 1981
Portrait of Maria Theresia, Queen of Saxony
Ludwig Theodor Zöllner · after 1829
Gevuina avellana Molina
Artist not stated in the record · 16 Jul 1975
Portrait of Maria Theresia, Queen of Saxony
Carl Christian Vogel von Vogelstein · 1827
Distichlis sp.
Artist not stated in the record · 2 Feb 1967
Virgin and Child
Dieric Bouts · ca. 1455–60
Indet. sp.
Artist not stated in the record · 23 Jul 1976
Portrait of a Man, Said to be Christopher Columbus (born about 1446, died 1506)
Sebastiano del Piombo (Sebastiano Luciani) · 1519
Pleocarphus revolutus D. Don
Artist not stated in the record · 2 Apr 1983
Thusnelda at the Triumphal Entry of Germanicus into Rome
Karl Theodor von Piloty · ca. 1875
Mutisia decurrens Cav. var. decurrens
Artist not stated in the record · 4 Feb 1983
Study of a Young Woman
Johannes Vermeer · ca. 1665–67
Anisomeria littoralis (Poepp. & Endl.) Moq.
Artist not stated in the record · 6 Jul 1975
Portrait of a Man, Possibly a Self-Portrait
Velázquez (Diego Rodríguez de Silva y Velázquez) · ca. 1635
Fabiana bryoides Phil.
Artist not stated in the record · 18 Jan 1967
Madonna Adoring the Sleeping Child
Giovanni Bellini · early 1460s
Jarava leptostachya (Griseb.) F. Rojas
Artist not stated in the record · 27 Jan 1966
Medallion with Saint Matthew from an Icon Frame
Artist not stated in the record · ca. 1100
Melica paulsenii Phil.
Artist not stated in the record · 27 Oct 1984
Medallion with Saint Paul from an Icon Frame
Artist not stated in the record · ca. 1100
Cinnagrostis sp.
Artist not stated in the record · 20 Jan 1967
The Head of the Virgin in Three-Quarter View Facing Right
Leonardo da Vinci · 1510–13
Tillandsia virescens Ruiz & Pav.
Artist not stated in the record · 21 Sep 1974
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. 101 matched · 24 examined · 3 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. 10326 matched · 40 examined · 16 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 2026-09-06 14:51 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.