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 “Nicola di Maestro Antonio d'Ancona” — 63 records examined, 17 dropped by the rights gate.
Archives queried 2026-09-03 13:28 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Madonna and Child Enthroned
Nicola di Maestro Antonio d'Ancona · possibly ca. 1487
Nicolas Charles Oudinot
Henry Wolf, born Eckwersheim, Alsace 1852-died New York City 1916 · 1896
Scenes from the Life of King Nebuchadnezzar
Nicola di Maestro Antonio d'Ancona
Funaria hygrometrica Hedw.
Artist not stated in the record · 27 Dec 1910
Madonna and Child
Duccio di Buoninsegna · ca. 1290–1300
Trichostomopsis umbrosa (Müll. Hal.) H. Rob.
Artist not stated in the record · 26 Nov 1910
Saint Anthony the Abbot in the Wilderness
Sano di Pietro (Ansano di Pietro di Mencio) · ca. 1440
Aloina hamulus (Müll. Hal.) Broth.
Artist not stated in the record · 26 Jun 1910
The Adoration of the Shepherds
Andrea Mantegna · shortly after 1450
Bryum chryseum Mitt.
Artist not stated in the record · 26 Nov 1910
The Birth of the Virgin
Fra Carnevale (Bartolomeo di Giovanni Corradini) · 1467
Husnotiella revoluta Card.-McTeag.
Artist not stated in the record · Transcribed d/m/y: 25/10/11
Madonna and Child with Angels
Pietro di Domenico da Montepulciano · 1420
Pseudosymblepharis circinata Broth.
Artist not stated in the record · 26 Nov 1910
Madonna and Child Enthroned
Carlo Crivelli · 1472
Pseudosymblepharis circinata Broth.
Artist not stated in the record · 27 Nov 1910
Saint Francis
Federico Barocci · ca. 1600–1604
Barbula bescherellei
Artist not stated in the record · Transcribed d/m/y: 27/11/10
The Nativity
Antoniazzo Romano (Antonio di Benedetto Aquilio) · 1480s
Braunia secunda (Hook.) Bruch & Schimp.
Artist not stated in the record · 26 Dec 1910
Madonna and Child with Angels
Gentile da Fabriano (Gentile di Niccolò di Giovanni di Massio)
Husnotiella revoluta Card.-McTeag.
Artist not stated in the record · Transcribed d/m/y: 27/11/10
Madonna and Child Enthroned with Saints and Angels
Francesco Botticini (Francesco di Giovanni) · 1493–95
Barbula spiralis
Artist not stated in the record · 26 Sep 1910
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 · 0 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. 59683 matched · 40 examined · 17 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 2026-09-03 13:28 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.