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 can't use it.”
Google Play · 5/5 · 2025-06-18

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): d0fe9d8237a7ae3fa2281b9c03a4412113de812df7cd5c474210a19c38c596a5
Signature (Ed25519, base64): 5Qy4i5rSB/WFsxB+0a9XEW8Jm/3Qy25DQkfsmk+CUTaf+DSRY1iwYAUZDZfG+7lEWqYh4e12cX0g+cW7YM8DCg==
Merkle root: e299bf38720a5a91bdf63bbc0205245bccdf3432ab1652c69342549658b7a9ef
Merkle path: ["d0fca200087cba0d0de2f6962854027f8525fed5ea433be8727527791f780490","2a01ca80312fcbf75a754c941ba71c26528a3a1bf8ac3e80b406a32c3044a6d8","faee7c3ceeafccda3361d0765277eedb7d8d773f2c32c48f2dd7265ea1936928","a3de039da693285dbf582c25adc10a8c6ffc8ad171fde3cceffeaa9e57f62780","da8a3a465dabf97e0aa9ac9c85c728f3f29b77dfd940a855a4b37237170ae47c","313d662609e20351873a943e0007d1f6f523e60f453a0a9be7471816c74acd68","c6773e60e7bb2b3661ad6dc09ce8706e79fc353832196c3cece6254191a44857","01652c7291665999c1cf6e685a83f2d25e7d6e419608b0c01894a91e2814ff63","9c006a2b073439d25bb1f73f7096ac809057a45e9335bb63cc7b74772a781533","64af775fb7e27729ea2cc1b3c5d5f572e79919303ede1449f6a7f905276e5df5","8dd3545839055f7d4fd148a3c52b8f00591fec4cff65bda0b272f8625df59986","bf08a7b70abd12d7b26586897b736d1c0404f066aa427e277708a875f0cb6bcb","06f94171d32c86f72a9e1d984f2a7c3fa7bd9f00a98eabaa3fbd7d57db71aaf2","e3714293de39ce3c6e3cb9d5ea7711343b19d2be532c75504682d8ef52e8f91e","2a462314156907e42d6f0d96eed96123f1d79516aef73ed189d9f5466556b638"]
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/durability/en","quote":"I can't use it.","rating":5,"review_date":"2025-06-18","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.