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.

“Easy to memorize”
Google Play · 5/5 · 2025-12-11

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 2907673729

Proof data

Record hash (SHA-256): 55b7d87eba6509c5707ee7916314ac3406390eed0193aa6bfda6c914b33ea99d
Signature (Ed25519, base64): G2D2bFO+IPlEfl8ap51Yk9MVRdu3BTwomTrUCQI0ZIdcTRDN5tUpNaoCl+GuX2peh54uzTnHzqfNI1kflOwPCA==
Merkle root: b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02
Merkle path: ["55b88453494f0fb5e6bb55bbfda526a2982bea77c1d88cf0ccb48e5a918d3e80","9d2ea294ec234d6e5692d0e338721e193d489b2c3fe67b6147821525419fc788","d66657c114b1dd0b4fbf629d63354c56e56db13f5bd383ebca1506b26176ea0d","0c52182e183d85e37ec85488221a23c5f60752172524c2088e4fffa082e9e10e","03da358517da4c65247fae6dd7064814bb31dac9fedff4df11965993814d5b00","aa2beeed143dbea3003ed46dea7cb4ede678ec1175af32370754faa639e983c4","2b1ed0fc2698cf574b00b202749f172a7a0850bde128be210ba29aacf938145a","eb2b1752ca0a13c0d4723fd4453e4b9e4f6b81a7d961f6c1f6effc3a42a3cd29","0618a322ce6b079e6b3825feef5e95a758d6a67a2737a764f76491f483c37ad2","ad0aae11f52bbbb06ea51de50925d251a694c98865b17a3619de68e30bfbd477","87d389c83fd89e992a96d0b9792dec0eff9c6544ae6310a697648d3aba29323d","0197d988959ac12f7d8946ff2581c88b7ba9a4305193828cca53fbbb9832a064","bcc0d977b8ab2060a87584efe5d0f5545e840726716d3f02c248db108122259f","6c299608515c69a03540be35865f96ca4932f3e0403f8f39fb0e1c2e2aedffb4","43a562d6822dab12c673c1efa0a3171d1ef69b949f676fb01847e1e5b56274de"]
Anchored: 2026-09-22
Public log entry: search.sigstore.dev, log index 2907673729 · entry 108e9186e8c5677a06ea…
Expected log hash: bf9a74000249ba6e66b1e29aae9d8cb95c3400dc118569a80e5c0949f3e8ac62 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":"v1789969984102","kind":"published-quote","locale":"en","page":"theme:vaia/durability/en","quote":"Easy to memorize","rating":5,"review_date":"2025-12-11","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 (b9a08f9d6d76…), 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.