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.

“Es gibt keine Option, sie so zu belassen, wie sie sind.”

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)

26e87b0418e9d47d160830354d40d7da520100d497c8c624bd1dc506d1abb090

Signature (Ed25519, base64)

RMkX/H/kyhn3tSaLCBMfk/R+2FRBn9pdPf8RYMosUBFk9flVW0CtmHHQcJ/JkcG5+pFPHi1RW+4ozHu1ru5pBA==

Merkle root

a6a2b4c9d7d1eafa4a3ba3595aa08f11c105165de84940ffc059f837c445104f

Merkle path

["26eaa7a6010fccddc8dfcd38908c3ead5a77d6716e954cb7df7aa678200eacc3","6fe7ce21833459fccb234749dec894817dd8172cf8cba44ff91550cb586b217f","9f336e7aa0fca86775902f891da469c003ced0eaec5033f2de0d8e964637bfe1","10e275e50444c776edfc2044ea6699a31de920e45491216c2a3608345354a609","b3ec8b76980a552e9e2f811358b96c04f7c9f74f7d6a666a8eccd9a5d589bf25","b4850507b903fb0e50e6cf63f671ff741ce4f7f84de8b224b6a3fb9096e04845","1ecc2fa669cfec567183c6738a3b0d21c1b0387fa9cef9518b09ab94b698e078","9acf5d64c1a9dd5c7f2cb0441ff982c3258c13cdcdd81ded47668e564cffaf0b","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":"Es gibt keine Option, sie so zu belassen, wie sie sind.","rating":2,"review_date":"2025-10-06","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.studysmarter","v":1}

Verify in the public log

1. Open the Rekor entry (pre-filled with this proof's log index).
2. 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.
3. Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
4. The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
5. 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.