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.

“it is really helpful and give understandable explanation of concepts”
Google Play · 5/5 · 2026-10-06

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 3248278454

Proof data

Record hash (SHA-256): 25625326a7b6bc7ce10d5f963afb9e3f11cae5fdec6ced16cb232e125db501df
Signature (Ed25519, base64): yO09CeqOxYSjYK2gJVW+Ff1mIqsu3jGODVsFEjm2cPIDo8g4Obx4OrGSsX97wOfXJb4idG1zlZsZVKn46yGZAg==
Merkle root: 81db1abd6b6e636da393518bb64e907fa9c48581b44ac2be5a9e74d02608e451
Merkle path: ["25622c682c82f47e018a83fce080c56b31afe31b3e8e5c8679818e495bee5a09","2b6afc8c2ff421989ceb063113718e4aef0f6288dae862201a7b923cf7c12166","75646edbb54982f6e8915acbc641d0b9b04797e0cc1f3bec87be63cd555ce7bf","4aee9d5fea08b51bef43abce7ce79243163ba8b9d2bbcef2ff5e228cd2148195","2f49dd0b5f34cd863ba02002c830d3e7fd62051c9bda2aaeea7f29c2ad2a8422","98a8b8395bb5582ea32729d3a11142aded32be6d14881534d417bad9c03f12c1","086103eafa63007eec6fd333f77ca9e37e3b409b459296136fe23016a6b3d43d","df8ec459bead0ee158b9f0772847ca2c425bc9ac22e008deebe71ff684d4d30a","15e7eb0ad9b30622944db6254e1c032492875c8f13c45493d986e9ee65a0ca6f","af13f2fe41fdb8e2eb8dd9859b885ade04f53f600c200569d07c59de5b1599c8","f0d849fe2b2b2e8ac46eb31ce8ef0940645609e0ab080116168fd866668ba7ee","0f8ab31a8b7f9aa6ba4ff019c72fbe9792e5837d40b3bad40ea1cfb0cc79e40a","4fd1b36929337d346b3723be273df6d7588bc7b080f058260d538b3f309857bd","6fa310e475466f0115dd6b7ba199f23e915f2a513e2610274356ac5bd367e940"]
Anchored: 2026-10-14
Public log entry: search.sigstore.dev, log index 3248278454 · entry 108e9186e8c5677af67c…
Expected log hash: 4dfbbd25ce402c4821f7e2d50b18e091e9a30465f45669967c545fb71910f358 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":"v1791948368672","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"it is really helpful and give understandable explanation of concepts","rating":5,"review_date":"2026-10-06","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 (81db1abd6b6e…), 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.