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 “Porringer with cover or posset cup” — 64 records examined, 27 dropped by the rights gate.
Archives queried 2026-09-06 03:23 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Porringer with cover or posset cup
Artist not stated in the record · 18th century
Nouveaux Desseins pour graver sur l’orfeverie
Masson, French, active late 17th and early 18th century · late 17th–early 18th century
Cup with cover
Artist not stated in the record · ca. 1650–60
Covered Porringer
Claude Laubreaux · ca. 1750
Cup with cover
Hans van Amsterdam · 1533/34
Nouveaux Desseins pour graver sur l’orfeverie
Masson, French, active late 17th and early 18th century · late 17th–early 18th century
Turned cup and cover with inserts and original case
Unidentified · ca. 1620–50
Double-Handled Porringer (Écuelle)
Johann Erhard Heuglin II, German, 1687 – 1757 · ca. 1725
Coffeepot (part of a service)
Meissen Manufactory · 1723–26
ECUELLE ET GOBELETS
Henri Sallembier, French, ca. 1753 - 1820 · 1805
Cup with cover
Artist not stated in the record · late 15th or early 16th century
Title Page and Goldsmith’s Designs for Boxes and Bottles
Masson, French, active late 17th and early 18th century · late 17th–early 18th century
Tazza with cover
Artist not stated in the record · ca. 1550–55, with later restorations
Posset Pot
De Paauw (Peacock) Factory, Dutch, active 1651 - 1774 · 1705–40
Terracotta cup
Artist not stated in the record · 6th century BCE
Porringer
Artist not stated in the record · late 18th or early 19th century
Standing cup with cover
Artist not stated in the record · cup: mid-17th century, finial: 19th–early 20th century
Porringer
Artist not stated in the record · late 18th or early 19th century
Tazza cover
Artist not stated in the record · mid-16th century
Porringer
Artist not stated in the record · 1770 - 1820
Standing cup with cover
Lorenz Zick · mid-17th century
Porringer
Artist not stated in the record · 1810 - ca 1840
Standing cup with cover
Lorenz Zick · mid-17th century
Covered Cup
Artist not stated in the record · 1748
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. 202 matched · 24 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. 459864 matched · 40 examined · 27 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 2026-09-06 03:23 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.