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 “Oscillatoria princeps f. purpurea Collins in Collins et al.” — 64 records examined, 2 dropped by the rights gate.
Archives queried 2026-09-02 00:27 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Elizabeth Farren (born about 1759, died 1829), Later Countess of Derby
Sir Thomas Lawrence · 1790
Oscillatoria princeps f. purpurea Collins in Collins et al.
Artist not stated in the record · Jul 1900
Boating
Edouard Manet · 1874
Oscillatoria salinarum Collins in Collins et al.
Artist not stated in the record · 29 Jun 1903
A Section of the Via Sacra, Rome (The Church of Saints Cosmas and Damian)
Christoffer Wilhelm Eckersberg · ca. 1814–15
Arthrospira jenneri f. purpurea Collins in Collins et al.
Artist not stated in the record · 4 Oct 1908
Irises
Vincent van Gogh · 1890
Arthrospira jenneri f. purpurea Collins in Collins et al.
Artist not stated in the record · 4 Oct 1908
Roses
Vincent van Gogh · 1890
Oscillatoria salinarum Collins in Collins et al.
Artist not stated in the record · 29 Jun 1903
A Woman Seated beside a Vase of Flowers (Madame Paul Valpinçon?)
Edgar Degas · 1865
Oscillatoria salinarum Collins in Collins et al.
Artist not stated in the record · 29 Jun 1903
Self-Portrait with a Straw Hat (obverse: The Potato Peeler)
Vincent van Gogh · 1887
Oscillatoria princeps Vaucher
Artist not stated in the record · 10 Aug 1890
Sickle sword
Artist not stated in the record · ca. 1307–1275 BCE
Oscillatoria princeps Vaucher
Artist not stated in the record · 17 Aug 1890
Madame Georges Charpentier (Marguerite-Louise Lemonnier, 1848–1904) and Her Children, Georgette-Berthe (1872–1945) and Paul-Emile-Charles (1875–1895)
Auguste Renoir · 1878
Oscillatoria princeps Vaucher
Artist not stated in the record · Jul 1898
Mäda Primavesi (1903–2000)
Gustav Klimt · 1912–13
Oscillatoria princeps Vaucher
Artist not stated in the record · 19 Jul 1890
Relief panel
Artist not stated in the record · ca. 883–859 BCE
Oscillatoria princeps Vaucher
Artist not stated in the record
A Village in a Valley
Théodore Rousseau · late 1820s
Oscillatoria princeps Vaucher
Artist not stated in the record · 1 Aug 1943
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. 43 matched · 24 examined · 2 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. 7461405 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 2026-09-02 00:27 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.