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. 17 shown for “Serpentine triangular prism with circles” — 46 records examined, 25 dropped by the rights gate.
Archives queried 2026-08-28 17:40 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Serpentine triangular prism with circles
Artist not stated in the record · 2200–2000 BCE
Moon
Artist not stated in the record · ca. 1780
Steatite triangular prism
Artist not stated in the record · ca. 1900–1750 BCE
Polyhedron Model by Martin Berman, Augmented Triangular Prism
Berman, Martin · 1970
Steatite triangular prism
Artist not stated in the record · ca. 2400–1900 BCE
Polyhedron Model by Martin Berman, Biaugmented Triangular Prism
Berman, Martin · 1970
Steatite triangular prism
Artist not stated in the record · ca. 1900–1750 BCE
Polyhedron Model by Martin Berman, Triaugmented Triangular Prism
Berman, Martin · 1970
Steatite triangular prism
Artist not stated in the record · ca. 2400–1900 BCE
Perspectiva: Corporum Regularium
Wenzel Jamnitzer, German, 1508–1585 · 1568
Steatite rectangular prism
Artist not stated in the record · ca. 1900–1750 BCE
Sidewall
Artist not stated in the record · 1820–40
Sidewall
Artist not stated in the record · 1820–40
Chaise
Artist not stated in the record · 1860–70
Dagger Form Knife
Artist not stated in the record · early 16th century
Cream denim hooded jumpsuit by Douglas Owens
Douglas Owens Gear, American · 1990s
Sidewall
Artist not stated in the record · 1875–85
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. 6 matched · 6 examined · 0 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.6 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 255994 matched · 40 examined · 25 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 2026-08-28 17:40 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.