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 “Maryland Line, MD, postmark handstamp” — 40 records examined, 1 dropped by the rights gate.
Archives queried 2026-09-01 00:52 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.The Metropolitan Museum of Art: HTTP 403 from collectionapi.metmuseum.org. Results from the remaining archive are shown unchanged — nothing is substituted for a source that did not answer.
Maryland Line, MD, postmark handstamp
Artist not stated in the record · c. 1870
Maryland Line, MD, postmark handstamp
Artist not stated in the record · c. 1860-1870
Maryland Line, MD, postmark handstamp
Artist not stated in the record · early 1870s
Stampless Cover
Artist not stated in the record · 1847
Stampless Cover
Artist not stated in the record · 1796
Rural Free Delivery self-inking pocket handstamp
Artist not stated in the record · June 4, 1902
Stampless Cover
Artist not stated in the record · c. 1850
Railway Post Office cover
Artist not stated in the record · 1847-1849
Stampless Cover
Artist not stated in the record · 1850
Jerusalem Palestine to Haifa cover with postmarks on album page
Artist not stated in the record · November 13, 1940
Circular hammer backstamping handstamp
Artist not stated in the record · 1880-1913
Union, ME, duplex handstamp
Artist not stated in the record · 1917
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. HTTP 403 from collectionapi.metmuseum.org. No records from this archive are shown for this query.Unavailable - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 484533 matched · 40 examined · 1 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 2026-09-01 00:52 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.