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. 13 shown for “Mount, William S.” — 64 records examined, 47 dropped by the rights gate.
Archives queried 2026-09-05 23:43 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Pair of vases
Artist not stated in the record · mounts ca. 1760–70, porcelain early 18th century
Mount “Hollow Back Violin"
Mount, William S. · 1852
Cup with cover
Hans van Amsterdam · 1533/34
Long Island Farmhouses
William Sidney Mount · 1862–63
Disk Brooch with Cameo
Artist not stated in the record · ca. 600 (mount); 100–300 (cameo)
Ewer from Burghley House, Lincolnshire
Artist not stated in the record · Chinese porcelain 1573– ca. 1585, British mounts ca. 1585
Ewer
Ferdinand Eusebio Miseroni · ca. 1680 and early 19th century
Hippopotamus ("William")
Artist not stated in the record · ca. 1961–1878 B.C.
Double-chambered bottle
Wari artist(s) · 800–900 CE
Quilt, Album pattern
Brown and Turner families · begun 1846
S. P. Avery, Engraver on Wood
Samuel Putnam Avery Sr. · 1800s
Two-handled bowl from Burghley House, Lincolnshire
Artist not stated in the record · Chinese porcelain 1573– ca. 1585, British mounts ca. 1585
Potpourri bowl with cover (one of a pair)
Artist not stated in the record · porcelain late 17th century, mounts ca. 1745–50
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. 19243 matched · 24 examined · 8 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. 1113935 matched · 40 examined · 39 dropped by the rights gate. Kept only where metadata_usage.access === "CC0" and an image resource was published.1 shown
These figures describe the pass run at 2026-09-05 23:43 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.