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. 12 shown for “Johann Heinrich Otto” — 24 records examined, 0 dropped by the rights gate.
Archives queried 2026-09-01 05:07 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.Smithsonian Open Access: HTTP 429 from api.si.edu. Results from the remaining archive are shown unchanged — nothing is substituted for a source that did not answer.
Birth and baptismal certificate
Johann Heinrich Otto · 1786
Birth and Baptismal Certificate
Johann Heinrich Otto · 1782
Fraktur
Johann Heinrich Otto · ca. 1770–1800
Fraktur Motifs
Johann Heinrich Otto · ca. 1780
Oboe
Johann Heinrich Grenser · ca. 1806–13
Johann Joachim Winckelmann (1717–1768)
Anton Raphael Mengs · ca. 1777
Field and Tournament Armor of Johann Wilhelm (1530–1573), Duke of Saxe-Weimar
Anton Peffenhauser · ca. 1565
Tobacco box
Johann Heinrich Giese · ca. 1760–65
The Visitation
Master Heinrich of Constance · ca. 1310–20
Horse Armor Made for Johann Ernst, Duke of Saxony-Coburg (1521–1553)
Kunz Lochner · dated 1548
Allegory of love, hope and plenty
Johann Heinrich Balthasar Sang · ca. 1750
Birth and Baptismal Certificate
Henrich Dulhauer · 1784
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. 347 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. HTTP 429 from api.si.edu. No records from this archive are shown for this query.Unavailable
These figures describe the pass run at 2026-09-01 05:07 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.