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.

“Therefore helpful for studying”
Google Play · 5/5 · 2026-09-08

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 3178600936

Proof data

Record hash (SHA-256): 3136a5d440a90b93eb99792efa5d3eaf54ddcebd307d2a894e0c9aa8e9aed250
Signature (Ed25519, base64): Ry5heSDBpJr06aYCAb+o5kx0OiI10jFvwcVyt98BIWHvVej9d+RIUV6zWrxXmd4jqnfitU8FgPfV2UnobhcJBA==
Merkle root: eee462924587f8024361bc8d60043805cf5210f8bd2ef7667df06d093552f9e6
Merkle path: ["31381b6dbd2ef81397c74cc91aba215dc2410db342449ea33563e4436ec34631","0dc22801172a31f83d5600c4a1a25bc621a5ea8c9c12a4a11f9348748d1c2dfc","cdff70e3f1cac27a6303348ef31673718a4db30fcf13b1859e2d0220e8e72a0d","3399ee34e3f0e5a805ce7a67c3b402e7a368d085ac5df6c01f19d7fba39ba4a6","ffb2fee514cf8891d8b6eedaf064a4607273cdb90e12236ad80f2e524d55dbac","dd4119a3e9f5a9da768ac087f19767873229dba0b1429fea9a57253002a72345","32ce40bbe38cf17ae8e6d5c4fa81a2b840b9adc690b2bbb437705ca8269a1ba4","34efef52d35684fd51c21ad827d07dc572db6d09f93d60714a76ba228323316a","b8f741cd74e77120d18deb265ac13fa8c3a1fa098d5a01e23c4a9cc0d6a68623","5dc44ec9a09b9580c08fe9ec1d17c83f6861848d98385c17df4903742b419301","e22e78fdddc7eeb3f60668ef62b942f372cc72aee0642245e1b1d727cf368318","5a28204f9372278679ccf6b3ebe28cb3da342cbf292d2015dc590fde73763288","2671ebca141255a0c11a3bc51354d8cd008634f7e59a58a3f3f9dc756141bb9c","a445a39a48770a8fbc5d87a405ed660d401fa810eac6fbd1d284a96f8c7d5503","452f4fcbca19997a15e6a6869c50e026ff02cb90a6ef21da106ee0457e55941a"]
Anchored: 2026-10-10
Public log entry: search.sigstore.dev, log index 3178600936 · entry 108e9186e8c5677a6a91…
Expected log hash: f3dccf508afcb5e89d56dabc8c5aead85de215b1b896d057d463ea1c1bdb13a3 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":"v1791606586319","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"Therefore helpful for studying","rating":5,"review_date":"2026-09-08","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 (eee462924587…), 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.