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 helps you to prepare for exams in a Short time”
Google Play · 5/5 · 2026-07-14

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 3247835674

Proof data

Record hash (SHA-256): 3064412447168b41d014a3e8ad58af0e0748952a335d952ddd6ebd11e82ef916
Signature (Ed25519, base64): FxSXqj7J+6U5j3U+boYAie3cbNOxyMENq2FWjzyrhdLoRDiXGo1HaZglUvjs/gqJKVThX+FliAxfFu+iQLpWCg==
Merkle root: 8af5f2f3f65c47a75dcdddbf363e3e76b22d37f4e953d150fcfa3e84bb04dba5
Merkle path: ["3063dba4c8a9479818c29f28a05ddec293e338c1c56b8f5f26e288a67bbd1910","df007292f23eac829cd3c753574bf4910a0f247033bb98b8b6c03dae091d29cf","7454a37d9b4fd993b1da461bafd4419ef2469cc55b236e62dc5283d9e32ebd50","e0a2b81de416dc1bf36edc8958d0411a19b7c971d6a03683401d2077fd07e0f8","9d752acb5c925c1c756c4053e48093b4f571bf8c301d318e56d4c5857c273d27","9c42d4f3d502e64627e884e40703d4d5419e3bbfd921c5ee54a45609d38a3ba4","800ea3e955a02919f2860306e9bb5ab01f417087895e3150d5972c46ccb9a97d","0cd389486941dd0a9211ec92be4a60732b393c7e827b5a5d32b09c31d3d47659","754f91213917aed050a91f2394869a6c27b878878d4318a74c501780f70a9173","ea17c4110a172c543048bb89f394c864a8d90f9cc529b7dd64029949bc8e061a","f85dfdd2ab86046e8846d1cf4a09b7f25f7362e1cbbb39e975af34e4c92fc761","655d3cb3e6f23a95a7bcfab67fbd3f535bbc0ce71a1ebce283b6fa005ab8af3e","2df4d836b73633f71fa96faafac3d9d32f00951d180b99885afa9511763f7b1f","2212eb5ff51e97198ac2cd6542275dfcf712b9be9a8fab294a9bf844689bcee1"]
Anchored: 2026-10-14
Public log entry: search.sigstore.dev, log index 3247835674 · entry 108e9186e8c5677afded…
Expected log hash: 306cff230c51a4aeee6711c8f2603eb2af6985e8dc9f5dc959efafe3398b8caf 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":"v1791944613264","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"It helps you to prepare for exams in a Short time","rating":5,"review_date":"2026-07-14","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 (8af5f2f3f65c…), 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.