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 had to spend the beginning of my study session looking for a way to review the cards I created.”
Google Play · 4/5 · 2026-07-15

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 2904877428

Proof data

Record hash (SHA-256): 8fb180d99d88739c31254979fc6a1c6886ad74b0a667e2b34f79ed014c91020c
Signature (Ed25519, base64): jLHTgEO8bxMOHBvrKqWX/+hqXR/8WVy8A/a6lF79eIx5G8wx9/1eI3JhXy8cB29o9gJ1MDLH0qPnYzXTUB0lAQ==
Merkle root: e299bf38720a5a91bdf63bbc0205245bccdf3432ab1652c69342549658b7a9ef
Merkle path: ["8faedac50c4d1bd6e0c3cd0f145287d10eb9039c8e1a0b77a063ba75e062a11d","d6aca8495bc5f72cbd06a1c2261b6694477170bd4295cb3f923566cbc1af90a0","77e3d31b98e6f7d89aa3b2872b535daa23975f388daaa412b491b07908ae3147","ff422eda5ec5aca2418c1d73a6a7926a4b38fc6343ecb3e9d410c28ab0424df8","0b2aaf0f51a618e418c9ba58aa1d01d6df3f7b423da5367a7c470ce16171f28d","8d1d916be885b30079567b8b5ac87e1741b3d1438c095cfcbcaf5462c41d9003","666764274a87058ccb3ff43d9e5012aaceec7a681d451d88f242828cbb983241","9288a665d0dc9701cedb4ad65700f871340de33f2d4f12aac004d56acb9ff88d","3d81e34dc24982360504b539e466cdb720296df965c5141d5bb949cf654f0c0e","39e0541676b1b5f08764015169838aa7ed6eaea7e123a116d8ba1e7e5b3b2e4d","3ffdc1ad653f39c0429787d5c91bba35366ff0cac1e131f271cc3308cb191be9","9c56efa7498f22733bd81d9e1a9aa96f7fa30f782f3e2c5dc658ff683f136fda","3fdd31064998e61048d534909957bf68a4f9bbe35571f6d185756d8acc2a5420","aa4bbeb87247c2797626ab02a549451da6dfce4dcb854a36fdcc601e3e788772","bce5d442c07de6307e5ea8947098e74ce88c2246eda5e5fc1015a6d7519228a8"]
Anchored: 2026-09-21
Public log entry: search.sigstore.dev, log index 2904877428 · entry 108e9186e8c5677ab408…
Expected log hash: d020708737f55ccdf49203f373fcbcefe8158cc388605556fbfda3c365de7360 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":"v1789881486272","kind":"published-quote","locale":"en","page":"theme:vaia/ordering/en","quote":"I had to spend the beginning of my study session looking for a way to review the cards I created.","rating":4,"review_date":"2026-07-15","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.studysmarter","v":1}

Verify in the public log

Open the Rekor entry (pre-filled with this proof's log index).
In the entry, compare spec.data.hash.value with the "Expected log hash" above: it is the SHA-256 of the Merkle root string (e299bf38720a…), which ties this proof's root to the log entry.
Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
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.