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.

“Ich nutze die App seit <3 Jahren einigermaßen regelmäßig.”

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)

ceb9cefaea8ef70c7d134fbcccf40de31412ae61f666e2a0166e9387e3b053a2

Signature (Ed25519, base64)

g06z22rv6V0wgA9lL3hfv2WtW1bQ+rHLif0vWpA0fTlqO6gIWFSL28P1LAH74/hCGvRY5jSjzIAV2kc1U04SBQ==

Merkle root

b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02

Merkle path

["cebec09a4ae752d373af00a2292ea3db081e3981f5723199d5779480168f52d4","083ea8e1c2a696cbc3ae3c3acd35bf1a899a145beb4b94315056ba13bfe99602","3589a48d5574125b308e99215599d74aca3e25d4e9ca2edf54b51b07bdf43505","aa9d7a59ec697bd7ead42ca9b295212a90e5d13d5e35ae4b9ee2ab010cb038aa","530436af253b1bbe32cb68eb05972630ef580ac08ad0c69d92614831be3f8069","7d3f5371474b7c6f592427c4b95387523da866786052a427fb431a18559e4e67","4919bafcfa2a6e98be12aa9639a6df1700bb81de0796eff9d6364e0d1dceee93","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":"de","page":"theme:vaia/durability/de","quote":"Ich nutze die App seit <3 Jahren einigermaßen regelmäßig.","rating":5,"review_date":"2026-09-14","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.