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.

“I have to do it from other devices”

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)

f61fd59ac8f1b7872d9915af800f141341a81f50a981a6b773df522a2ba9afc9

Signature (Ed25519, base64)

+YMfNmxv4wN9dIW44UyzE1keVybqU2/VPbUj0JKKW07gMIPtRJqPjkNLYZPRRBJKKl6eKl/B4dhl0Unz3ltVCA==

Merkle root

b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02

Merkle path

["f6207836b780d796951ebec76d57e6b0032cf191d63f87a0f9cb6ba4d29b2dd7","a35b5d9c568c641860e9ffba223863c69902267897b72cea701ba76db9398148","fa35c3de00394aa680a5f7ce7eea2a64e6c8d4024cefb0df35c0ae874bf34e66","d9024be32a6e9aacd91bd23433d80ec46defc593de0e47c4859cd52fa339891b","dd943ac87aedd16dedd0b5685a48a8199354e43cae9803694b495b4be9152316","9f81b5e6b54ea472913f7b401b8d8a7803334c9db162d8f52461af8b3a810720","7adf745796b666b14f5571d14594e39491b6927ba014eb978d248b0fcb0fd385","fe06ea7e1ca4013aea6fa730eab82f0d40bc8b4a23f1e81f257d5fa0ea116c7c","a73ddbd259cbf518d4ce098d1c42cc733a0dc1236adc531bc0cb5e5bfabc96bb","d32c39bad5dce323e576c283506b6fb7150c1c5a45bafb8288504a1620175dbf","58fcebd1d3d07f3a6ba5f31279f2ecf014cdac37bfe65872be1ec5d6a456940d","e89b125d6d75a826a464fa50668f6e82a6668dbc929bfd3fce7c23cc14adfdbc","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/service/en","quote":"I have to do it from other devices","rating":1,"review_date":"2026-07-30","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.