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 “Undetermined artist” — 63 records examined, 13 dropped by the rights gate.
Archives queried 2026-09-01 13:02 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Terracotta fragment of a closed shape
Black Fury Group · first quarter of the 4th century BCE
Manilla
Undetermined artist · 12th-18th century
Bacchanal before an altar to the gods
Giovanni Benedetto Castiglione (Il Grechetto) · ca. 1645
Caftan
Undetermined artist · Mid-19th century
Melencholia
Giovanni Benedetto Castiglione (Il Grechetto) · ca. 1645–46
Jar
Undetermined artist · ca. 1880
Ansbach and Coburg, View (a) of two views (a&b).
Wenceslaus Hollar · 1627–36
Pipe
Undetermined artist · Early-late 19th century
Madonna and Child with Saints Philip and Agnes
Donato de' Bardi · ca. 1425–30
Male figure
Undetermined artist · Early 19th century
Terracotta bobbin
Penthesilea Painter · ca. 460–450 BCE
Sketch of Details of a Ship's Railing
Winslow Homer, American, 1836–1910 · ca. 1895
Terracotta fragment of a closed shape
Sicilian · 370–350 BCE
Undetermined undetermined
Artist not stated in the record
Lute Player
Valentin de Boulogne · ca. 1625–26
Undetermined undetermined
Artist not stated in the record
Staff with seated male leader
Dogon or Bozo blacksmith · 16th–17th century
Undetermined undetermined
Artist not stated in the record
A Man Seated and Asleep
Giuseppe Abbati · ca. 1865
Undetermined undetermined
Artist not stated in the record
Study for the Equestrian Monument to Francesco Sforza
Antonio Pollaiuolo · early to mid 1480s
Undetermined undetermined
Artist not stated in the record
Young Man Holding a Book
Master of the View of Saint Gudula · ca. 1480
Undetermined undetermined
Artist not stated in the record
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. 23 matched · 23 examined · 5 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. 68529 matched · 40 examined · 8 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 2026-09-01 13:02 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.