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 definitely recommend it to the students who don't want to spend 4 hours a day just to write a summary of what they've learned”
Google Play · 5/5 · 2026-09-13

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 3240911465

Proof data

Record hash (SHA-256): 2c1321a303e7d53efffc89476999930cb319514427accd97bd7f752617efb476
Signature (Ed25519, base64): i4JW2A65HA8p3GRKedRr6UJMhgnMJdv/p9TVry6GSGevCPcRY2IOcYwAkYLkcKOUNXJPz/sB+c6TXxBuuwMbBA==
Merkle root: 274a7762154bd166543ff3cdffd566852c7127b7d67c5c835965884725fa5b5a
Merkle path: ["2c137cb08b0722b98e0ace0638a37df7d87124a34e442c4f4f2f02e67fca2d1c","557ce56803892b22863f69bf89adfdad480799c91e67262fcaef401c4e5bc2fb","52bb8ee6b84d25f177a93f2f85ba9f9b628eee4ac4cf92eb1b13330a1f88a203","62f00f5222b19c3ef70eabadfb9a94868a7725f4ac3e5df1956b6722aa2fd740","357c555f07a078bb7e872e43440a7988674cd39817e1561b86aaee9d20a3030f","8e5385b72702f2352ccf60409067fdfdee16d0ae60382524a456550442c27c97","64252b23d46afd3cae354685949c426ca31c4ff7bbeee6cba70ed6f11bd7bc26","ad1407dcb76dc130a71c5b3afba3eeeaeb3e4944e991d8eade8e590b1f82499d","d51891312ff922bc807618fa3c11e8b96fee1f02c62a8df03e8ae71bd88aebef","1c96afe2a63abc6114eb3a79b14a1203d8a0527765314edb52c541d142ccc424","24702e06e291aa1cbad65f2549cdc9408372754c167fcb7249a712b75b1b92c7","4e9e9bf46c43d71ed5302f960a878d42b37361bf495c828ceaa24d26c51bfe56","37e0bacf6aea102741ccf02dcd42b0de6a02c60397ad417aaaf9cff69daaf006","29e5b66d9f235b4df92caf0fbc75cded7863ab76bbe1924bd45c3ed8fea27123"]
Anchored: 2026-10-13
Public log entry: search.sigstore.dev, log index 3240911465 · entry 108e9186e8c5677a3a8f…
Expected log hash: 75e63ac56a22d308ee68ec8d436777d2fa26c934f80384e53bcc94d01475e988 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":"v1791863907329","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"I definitely recommend it to the students who don't want to spend 4 hours a day just to write a summary of what they've learned","rating":5,"review_date":"2026-09-13","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 (274a7762154b…), 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.