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.

“helps you learn through flashcards and essay type questions”

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)

e030c4c31a376f52fde792d79549249bcdfc87059744ae2894036c2a34e3cec1

Signature (Ed25519, base64)

gsrCW+YC5wLgwWMo92ML2J/O05EhlE0mPXuBMLcuxkS9mvy2k7/qNTt3jd9toS0BnzSlxvAbceMAjS5e0AXpBg==

Merkle root

b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02

Merkle path

["e03373aec0aa29491b8802de51a1ca3444da5cd78109942b6698b6a2a9bff174","0c273dd8b07ab65160cfaaa0e98bef94ae58ae3da7cc71c5db98368c739db38c","2aa482f991aaeaf676017e09822333d47ac0ad85ee0a8e4f9be62f44bc5be182","dea7a7465b5457d977b358e68aeab11e13282675a0e4e5604a7ec2bd0845fabf","1d2539e10415aece5caf7bb16e0b7270c7afc209ff8d286e4782a56559d6c564","d4b48b8f339c066378a3c79617841db09bc065c779a29e298a04dd1554a912af","27f3e41d416ea2db9df41125c8358bc793cb8c7520b1c05241b0b3e19e18fa60","dcb29f0dad5ae7cdad0d802ef16d9e73c5319d2eb3e21a7fc3b37e7d0a712087","928604a4c46c5a7dda6d9261ed25696d0f4c3c3226c5c8417b7021ed3d488fa4","f18e99ba7a78a6b565d7d78fe31bfc86a3092ebcdf35bb1810c3397e6664a935","d724de4db852592012d7e350c865d36fd56f7f3bf918292f4d807bd4b562df22","2d0841904d905b327cb803816e73e56fa86447bd28a90f792c27c874ed9a6b9c","c975f4076f62a76765a4bc502e988829db65110a1650004b828d2dfb5f90a9da","f92a7fda99af63eb008476cac47b147880eec6868f847624f8b438c917195408","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/delivery/en","quote":"helps you learn through flashcards and essay type questions","rating":4,"review_date":"2026-04-08","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.