Quote verification

This proves the quote below is recorded by Citatio exactly as displayed and has not been altered since it was committed and anchored. It documents Citatio's crawl observation; it does not imply endorsement by the source platform. The quote links to the original review.

“I can no longer upload images to create flashcards”
Google Play · 4/5 · 2025-02-12

Checks (re-run on this request)

✓ Signature — Ed25519 signature over the record hash, verified against the public key at /.well-known/citatio-signing.json
✓ Merkle inclusion — Leaf recomputed through the sibling path to the anchored root
✓ Public transparency log — Sigstore Rekor log index 2907673729

Proof data

Record hash (SHA-256): 9f0755818cccfe9b7b99629944f813c6a087b6c30bfca99df150f79cff86b0eb
Signature (Ed25519, base64): v/9wg4IqDvq59NR2aSQX2Ug2cnGhsriTKUfgzZGk8P0MMwtd9tTZdBGo2M2bXcb95N3jML6qHhKmECXYENy9DQ==
Merkle root: b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02
Merkle path: ["9f067e161edeb4fed4f81b65abfaf1d6082131159262585b38cc790c9a4b6034","261197c1171f97fa32766192aa68a7ddec83781d97fbe021ea37e3f34d31e2d0","416fbb1c736a85e354887740f2a40462f462b3a5e1def002141c54bc68913e07","942faac8f7a542be3966995ebb7bbeedc38cfeb0ff45506556258dbb15c8c8c4","3b139147b7a9e83ec5f7a1f4808ec51c69e384315d9901c670cc0af3c0d962b3","1c15e9d35f0d7bdea4d8a544d7edff5ab86f680de57405acb5d04bfefe80df30","5a03eb9e7105ff5be436707c6f5fe1dfdf8eb1a4129a01d25fdec0a6b283704e","7ba2afc5ea3a08a15510849db4b7ae9262d9bb558696ad691f8ab1cedf8339b0","1e2a6efad6d726750d54175ad4678925e192546ee95e9afdeebde870c02581f6","b66e52450462bdf556c8a902f7682218d3ca60c4db7b5b22218f469c0d7c5a1c","2ffc2611ccd8983110ef2e74a086c318f6a1426a73ab5eff0c34d768ba78b3c1","86f8c9575acc759d5eac58ad776858ebdacefb73351960cc2bdae6ffdcc2483e","e73087a4c89fcbfd62483a37ad723e600377233e603592ed8ad92c5db69f30f2","05978e8b9ad5fd39833c65b8b951e8c80cf426334c441fa8a8bff8eb8eeaf534","4543e8b9ac7bd077d9526acfdae449f0a0d5517cbb42414f50ef930ecdb9470b"]
Anchored: 2026-09-22
Public log entry: search.sigstore.dev, log index 2907673729 · entry 108e9186e8c5677a06ea…
Expected log hash: bf9a74000249ba6e66b1e29aae9d8cb95c3400dc118569a80e5c0949f3e8ac62 The log entry's spec.data.hash.value must equal this value: the SHA-256 of the Merkle root string above. Recompute it yourself from the root to confirm.
Canonical record: {"dataset_version":"v1789969984102","kind":"published-quote","locale":"en","page":"theme:vaia/returns/en","quote":"I can no longer upload images to create flashcards","rating":4,"review_date":"2025-02-12","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.studysmarter","v":1}

Verify in the public log

Open the Rekor entry (pre-filled with this proof's log index).
In the entry, compare spec.data.hash.value with the "Expected log hash" above: it is the SHA-256 of the Merkle root string (b9a08f9d6d76…), which ties this proof's root to the log entry.
Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
Locally, without any Citatio infrastructure: SHA-256 the canonical record (must equal the record hash), verify the Ed25519 signature against the public key, and fold the hash through the Merkle path (sorted-pair SHA-256) to reach the anchored root.