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.

“retaining important knowledge for longer”

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 3273084324

Proof data

Record hash (SHA-256)

14ffe320beb8cd8d7f90aed9cea1598e7776f99dfd3d157b857913aa858198be

Signature (Ed25519, base64)

Vt5+yA6KBmfE5LrfOSUzbFLkTXYcW3PPFhpvzvPoWoqga6c1REip9gLu6Ko4xpfH6EyWRR+kFIrrM3v00CcpBA==

Merkle root

4591ccf5fcdb01ed421243d02df5f30203ce391c077d4ade1ff5ee97e69e252d

Merkle path

["14feb05f2a5669279a5e93367a61bf1f56a32f81c93ac3c15cc2a7948e738510","daf6fc786159a5a488578f0acabbbdabae5e0011f7fe8ce58c69cc6c21ab862a","eb878faf02970a699746d8fd58435eccbfa3486004a0fd46f74f2acb95d5fb68","6dd275330df22e8f8b2b39b61a0dd25d966444cca61046c386dd929528a45f5b","bddb71aa0ff53f4f2ae779155a1e020bb3292eaebda7ab803e9583077033ace2","40c588a2fa6c7c5cf7cb2a6ed22f6b0512ae6e96d294b29671eea38f0378235b","11260d696c8d80b19297d955f21db9d391582ba74f14239a5575ee7aa4060231","9222116329d365bba00569459c796c0848b659d2f64e504e4f5aab5643100214","0e0285a548f7656c1f7348356954cfc8cb51831eadd9f122b7803581ad681b15","00d983fc7254b6831c8727262155e83ed73067ee761ee10b8ea341da26f2b736","c30f42bd5edd5503274d38897e30e0fd203a58a1d481887545f4163af761a24b","152c0493178cf6b4404f105673ebfb1205dcd47946cf0dc7bed8ccf29e922fd8","d52611af45c7ef524ab63e970b046a1061f8173af77bce3332bb854291964d99","04789af0aae7a52bbc7d5e129e675a1c89df82999aa606ccdd23b89f718c4ff3"]

Anchored

2026-10-16

Public log entry

search.sigstore.dev, log index 3273084324 · entry 108e9186e8c5677a4edd…

Expected log hash

52df3e0fd214b96d6c701f5f337408916b7566fa39826e2404f759c290be1eab 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":"v1792120358245","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"retaining important knowledge for longer","rating":5,"review_date":"2025-08-30","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 (4591ccf5fcdb…), 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.