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. 18 shown for “Tan Song” — 64 records examined, 33 dropped by the rights gate.
Archives queried 2026-08-28 22:42 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Landscape in the Style of Guo Xi
Tan Song · dated 1748
Sampler
Artist not stated in the record · 1815
Broadsheet relating to the soldiers' song
José Guadalupe Posada · 1911
Motacilla alba
Artist not stated in the record · 6 Dec 1969
Sketch for a Painting of Mi Fu Inscribing a Poem on a Rock
Kano Tan'yū · dated 1666
Famous Themes for Painting Study Known as “The Garden of Painting” (Gaen)
Kano Tan'yū · 1670
Famous Themes for Painting Study Known as “The Garden of Painting” (Gaen)
Kano Tan'yū · 1670
Mascot, Douglas World Cruiser, "Maggie"
Artist not stated in the record · 1924
Summer Landscape
Kano Tan'yū · 1662
Textile
Artist not stated in the record · 6th–8th century
Winter Landscape
Kano Tan'yū · 1662
Sidewall
Artist not stated in the record · 1850–1900
Portrait of Emperor Shennong
Kano Tan'yū · 1665
Lotus jolyi Batt.
Artist not stated in the record · 27 Mar 1990
“Bluish-Green Fish Scales”
Kano Tan'yū · mid-17th century
Broadsheet with a song in honour of the Holy Virgin of Solitude (Stma. Virgen de la Soledad)
José Guadalupe Posada · 1903
Broadsheet with a song about a military reserve, military personnel in formation
José Guadalupe Posada · ca. 1890–1910
Broadside with a song honoring General Zaragoza and soldiers who died during a battle on May 5, portrait of the general
José Guadalupe Posada · ca. 1900–1913
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. 36 matched · 24 examined · 1 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. 12648 matched · 40 examined · 32 dropped by the rights gate. Kept only where metadata_usage.access === "CC0" and an image resource was published.8 shown
These figures describe the pass run at 2026-08-28 22:42 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.