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.

“somit hilfreich beim Lernen”
Google Play · 5/5 · 2026-09-08

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 3273342496

Proof data

Record hash (SHA-256): 212489ecd25ee4c10d0440004f5ba49cbc17ec41dc8b1d79f5ae8eaff29f6061
Signature (Ed25519, base64): xMDvRZDCMk9S+roo36Szblmw60q8QmPCyGhzaFQcOOc+8feHMrQ+5cj54PKRttmz6AVmz9aFKKh/vGZ9l+DwDg==
Merkle root: a6a2b4c9d7d1eafa4a3ba3595aa08f11c105165de84940ffc059f837c445104f
Merkle path: ["211f55d63000fd1a5c950c9e7c5729488fd6cf2da039411bf20c5da23b990ed1","349612617b9da6512e4f59bba0926aa1f1d79df429bfaecc8bb4017c0d956e26","f2d43caf1488cb8e0f939b4cb715bcf5d808627188311bf4ec1a35f2fbddbf9d","a8906ec5590dc76122636f8b9945103d8451d5646b1cd7fc18d6fbb56949a49d","826ebc179393d44628330a184078480aa934a32dc77a1f4c6fd83bec00777a1a","397c658e11fdb13657310e269703dce6ec0624503dc604f62c318714f6a61c30","bb73b27d625ad8e0074942f4f9cf243de9fabc39024b8de7279bf4eac38260ed","708bcbd94a4edfe0aec7bcac8edada27ca19c0b9e02935cbd592ea618f5c5241","a43b47d2b94ac745e03305f25c2a0ff1e68158476852a2c45c6987b1ca49ba47","a6ece7c62bd8d9810b746a22e4ffc172b2bd7b4d4e53043178ac8a1fba5983df","fca4148b7d63d2155bd4f2c250f595d4390b55f1371317ad1717a801e3baccf1","8ceb1cbfd39c6c4db73ef7ebf9abc517c7ad214544f8291eb9ba9ebb0a70e4ff","95302ff16156d5e277933eeb7a8aae0bcc9cd9ecc1e7491c1aab462ce098abfe","d9b9cce27629bc902030340ceda068fb90d53ddab20309d3b3d8bb3949c170f2"]
Anchored: 2026-10-16
Public log entry: search.sigstore.dev, log index 3273342496 · entry 108e9186e8c5677a66d7…
Expected log hash: 8a8ea4260f3039926c3342603d4fca7ca9e5c627d841ac1c7142e303a049d0c7 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":"v1792122420855","kind":"published-quote","locale":"de","page":"brand:vaia","quote":"somit hilfreich beim Lernen","rating":5,"review_date":"2026-09-08","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 (a6a2b4c9d7d1…), 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.