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.

“There are dozens that offer the same service for free.”

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)

e9ce43c847de5754d62c9423849d849d45f1c5d51cf0bc6b00b2c9ce30657abc

Signature (Ed25519, base64)

NLRzgyYbiEoWjalB6/8c1SjxBO1i6oV2NqYd9iir17f6emRXnAYauy50MXaRP9QuU+nwBbJbRU3yVsx4T8BCDQ==

Merkle root

b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02

Merkle path

["e9cf639602d0e6ec332c2b6260ed1c4c351a5714e30d5c9c1572ad91183fd57b","53d0069d9341ed399c0c5319cfac38e94ebd45f573d03515fd6fe6e0536b4cc5","7a6dbae1adc7ee4f40b87424468017cf4d2ef66bf285230cb08c241b3ca27744","b211cc22d1cc566a61c68c81ca8f49c3d2f460773eed5ff2502c00b8f2537070","ad2ba543d3bc822745b168c133c18a8a2c506fb2d6b40fe6b6b8a7f8ec2645a1","8c2be2590facdb2539818497172855aeb26d0029a3504860d31907e6da610ba9","5a1c441ff150a89d6a4965b0a7eb320c682ddda1559a8c17176fd1183e5fb878","4796430840f44617a6baab5f90ef7e445cc45c6e13cf7a4a83f0787f4ee54f98","86994c23bd8868838e9a5db1abc7494dc6ef962f3ecad77b56ec3887bde6444f","042f0fec74521bc48ab41f2464714f41d7bee9882be5ad30840278c9559da714","bb894289bb71d3b696c9afbe454a75a78b206d9839b23e1a62e36de1c4316674","2d0841904d905b327cb803816e73e56fa86447bd28a90f792c27c874ed9a6b9c","c975f4076f62a76765a4bc502e988829db65110a1650004b828d2dfb5f90a9da","f92a7fda99af63eb008476cac47b147880eec6868f847624f8b438c917195408","4543e8b9ac7bd077d9526acfdae449f0a0d5517cbb42414f50ef930ecdb9470b"]

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/price/en","quote":"There are dozens that offer the same service for free.","rating":1,"review_date":"2026-09-14","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.