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 ist unmöglich, die Karteikarten zu exportieren.”

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)

7eaec2d2c2a4c7d931d085402604b75d7d2a7d7b1a61ea7e08565024fab3ef71

Signature (Ed25519, base64)

hE/j2/bRIZKcNWQVX7ENtLQXwBOmTeC/no3DTqFouZiAfgXmJIRzZpaPyt1Sd23PfK4roBcS1Z7GfEr7yu7tDg==

Merkle root

b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02

Merkle path

["7eacc4a44e2177dfd1e1a4b5d52de23282655fe2b47297eb2808446abf49d0b3","3b618001a8006889420335c9eba68e15d4361b3b4fa5d601c2e4f5ea57d5d1ec","9f778192a535bfa7b47267e818fd6f8d04854fef285017864ef4612b16e94b25","471a57ecd5284c943aaf9d5ebdc1270722992cc02c60b5bc20014c2f76c5e74b","4be2e9d26802b4470e91a3c31fe80db86fd08706c8dc790d8971298c62b3ff90","dbf5887c207ff46c1ec4dc7e24ace268df16b6e735242b474f57c79d2e928f1b","4cabb7987a7ce1ad30249ea42f223024d0053a8351672eec9873144706c8807c","c687a70eebaa2274fc6a102819110dee3eb7633e6aa8134f95946241e5e6119c","5b57a877b8ecef07a1f2e19efd70e95aebd9fbb4e88df5fec88e711f8559250b","3d766c6fa36af0771db4852cb1869434df58023b16dcf5f4872e0c4b38b00677","b12c24ca7cc480dac10d3c9e7ddd80a781d96f3b29af3e073b54d3ea0a23098b","d89f5af62fa7d0c6d0a9fe42e9680d2e7af53ca738a716457a3405d68b60cdb4","8b252735b283ab7584d9f6925f08ed38c911c64db001463eafabe5061cb6f9fe","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":"de","page":"theme:vaia/returns/de","quote":"Es ist unmöglich, die Karteikarten zu exportieren.","rating":1,"review_date":"2026-04-26","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 (b9a08f9d6d76…), 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.