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.

“The costs are very high, though.”
Google Play · 4/5 · 2026-09-19

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 3273053873

Proof data

Record hash (SHA-256): 2b6c6e09b4b10b9d304de3841be912dc7720c0e4b0fb6f34cce25e80ef1bea38
Signature (Ed25519, base64): JtMtEOCAdXDpo+bhB8sCeMOL9j0gilTuAuc8uTlhyjZB0+Ldpj2NW91xxO4YlmrrjuJpTliLGAj8WCs84FutCw==
Merkle root: 6953a5ba9bd00082fa1986982a5979aa7ad5b4654ec368f8d247f13243e4e4b8
Merkle path: ["2b6cb38563f2a4c8f5347b2d291328f657e6f25828c8446f89242720442566c4","8894aef1054d931394ed161d2212d704ddcb2af364a113d7985e74704541e1ca","7114af1ff9d063923b718cb1f1ebdfb8414eb3bdb192d5994209fc8cf5675a8d","a1d3d323302911451ddb08991ae6d562fe0ec3922acf6a08729195c93e8425bd","61f6dea5d2fd4b5f1495da37a738f652955d2ac5cf4a3d9a41f5203cbd8c641b","82993da18ce2e6254c77e8bbf803e451540cff07ac14ef01babb5aae938c175e","a5136cb352ae8dd4410460d762cf9de0fedb46c133b098d78d678347d1ee9f79","0deffdf370b5552ed0cc24ebc727d17f53bd35dad6ee794b4861c1d5da75be81","1171dcd44c2b606a7504309579760dc1cf1632f6d8e5d8c9396f929a358b439e","0ab72d00f9f17e93fafe5fb0e5ce2526d0dc199af82bef86269af0a9454168a2","72c3e38739481bd0a6b962b9809fc41fdc415b4ea8f89001926f0ebf61efd9d2","d42dc1b37546fc67d932c54c8efa2ed4184ceb43d115311d414f7b177c48c420","3d6624c631c3f201b337a52bc4f9494c99366c0aa74b4db152cef1b6807b4800","98a14e6f55278d0c3f64d31e6bb09545a033fdb7dd6455363be23426eb85b044"]
Anchored: 2026-10-16
Public log entry: search.sigstore.dev, log index 3273053873 · entry 108e9186e8c5677adb5c…
Expected log hash: 8e660c0f9c2f4acb2461077e20036379bc945573437a296969373758a8dbffb8 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":"v1792120102008","kind":"published-quote","locale":"en","page":"brand:zasta","quote":"The costs are very high, though.","rating":4,"review_date":"2026-09-19","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=de.zasta.app","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 (6953a5ba9bd0…), 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.