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.

“Diese App ist sehr nützlich für Studenten, die eine effiziente Zusammenfassung für jedes Fach benötigen, das sie lernen.”

Checks (re-run on this request)

Proof data

Record hash (SHA-256)
a31f59ad72b12b38357d6f73baf386ccc4cd5dd1d409ca034c3c8cd0078b31bf
Signature (Ed25519, base64)
0lq3C3h8BvdJrT8+FMULJP/dYi2Mk0oNINBoU8/02l6MlciwxLLVWXBkxKUCMSIbz/b9wtIx32lXEG/rxvPwBQ==
Merkle root
b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02
Merkle path
["a31f874236669ac014d9c6e2ad14b934ec61fd813c3542f73d1a9779d220c3bf","4b4505d57bfe7d3bf4b36aba11204070224870d19597b1d443b236f06fde5d30","3d3bbebfa97394ba30face7e5abb809328c0403020f6ffd219168fb002db9a9c","f305400051b55b3fa8e578193037b9a875cc5d161411db424b4052e6f2235c61","72f48636493d1873059d5cda86cdf7a6b3a8bd26b48a3698cd22e8519f279331","ec5853a57f917b8dcc9ac47931d55c6da18c73dc2ad27d07f37f208eab9164b5","289e7d57c980b7a71dc8af75cad450148f27c769845db0eb49d3544e469588ce","903fb0dbc670ffd5482a3f8fe3e620c0efbc336f2dcce7120be2f0d852646696","de4177f6456656d423dcf18cfc3194a7b1a5ca5cc76815afe2d296911f4cef70","cb85a74a28cb6eef7aa703b20ab89baa7afa01d92706b87c83096840758feb39","990e247af8afe193ae111976d0854ae6dbc82cc0fb2e8be7f20fb2ddb4d3be26","d0e82af4a03d7591b930166e680788d40e9d0f467d2d9124361d17c683e6610b","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":"de","page":"theme:vaia/quality/de","quote":"Diese App ist sehr nützlich für Studenten, die eine effiziente Zusammenfassung für jedes Fach benötigen, das sie lernen.","rating":5,"review_date":"2026-09-13","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.studysmarter","v":1}

Verify in the public log

  1. Open the Rekor entry (pre-filled with this proof's log index).
  2. 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.
  3. Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
  4. The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
  5. 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.