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 “Johann Friedericus Schloeff” — 41 records examined, 28 dropped by the rights gate.
Archives queried 2026-08-27 08:34 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Double cup
Johann Friedericus Schloeff · early 18th century
Walter Johannes Damrosch
Oscar White, born 1921 · c. 1944
Johann Christian Wiegleb
Artist not stated in the record
Johannes Vollandt Apothecte
Artist not stated in the record · 1646
Title Page "Calligraphia Latina," in Dissertatio epistolaris de calligraphiae nomenclatione...
Johann Caspar Schwab, German, 1727 - after 1810 · 1756
Johann Christian Preis
Artist not stated in the record
JOHANN BALTHAKAR MICHEL
Haid, John Jacob · between 1710-1767
Four Mask Designs
Johann Leonhard Eisler, German, 1672 – 1733 · 1720-25
Johannes Van Buyten
Westerhout, Arnaldo Van · 1674
Four Mask Designs
Johann Leonhard Eisler, German, 1672 – 1733 · 1720-25
Six Mask Designs
Johann Leonhard Eisler, German, 1672 – 1733 · 1720-25
Four Mask Designs
Johann Leonhard Eisler, German, 1672 – 1733 · 1720-25
Six Mask Designs
Johann Leonhard Eisler, German, 1672 – 1733 · 1720-25
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. 1 matched · 1 examined · 0 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.1 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 5530 matched · 40 examined · 28 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 2026-08-27 08:34 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.