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.

“The app automatically charged me for an annual subscription.”

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)

cf60814cafe7d625f5074373fcb48fa92c8a7f3f27c81570df6ef44c34cf1592

Signature (Ed25519, base64)

SFiZMes5W2iI/Z+2WDHwQBUKtWXaTD0AZK3kEN1/KTJkb1yiU2M9duYdYmNS940viYzke1d+Tdn6Z3Y4pPJBAA==

Merkle root

b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02

Merkle path

["cf6007729db634264b92a685d60136a835bfa5c40202026f04862ea2b8fcbeab","11b549dc7b28f834166f0b828753d8f25ce203f9a91b7761d5d7d90a426c6b89","da9738719667c9dee38b3737096ef9b3d407f462fbbda3f44abc97c94ca04ffa","445815a5074372c42c2f2af3ba328ad59d24085c35a4ac6ecaa36eaf401084f0","eae1621416554b0ebdbcc40250d6c6e368ad424a5f1b9a8193cdd54584beb4c6","096fef10af90b979e13a4ea6e477ab0ba4a95405dd57400492b3434fcfe4f211","d551b72cc354779fcda115936398fbb732f6cdf652064b10ca88bd22669d3a5f","3e44436c7f9700004066c66a9e5a28e963a7a45e00c9d5d1e3c69b2f1842f7f2","f2dea97a24938ca7c91099606fbd5d65dd59dfacd551bc333b5a4d47c530df1f","a42a21c77f0f0d8f54adcb950626a5c44276eef1210ab57b5a18ec668122bdf2","8401b8939dcfb94a48793e7552a885657c9d52892d88c0004505559f51cd6d5a","1324e7f8581b1cc3455b81e88efce3958a5b23eb7205ddfacaf930e32b10bd47","ff0ce3b59f4b6fff6b806e01d20d764fb2b7a5651693c19ab4bf8a8b5ce5f968","05978e8b9ad5fd39833c65b8b951e8c80cf426334c441fa8a8bff8eb8eeaf534","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/billing/en","quote":"The app automatically charged me for an annual subscription.","rating":1,"review_date":"2026-06-23","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.