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.

“One song, then four new ads.”

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 3178115911

Proof data

Record hash (SHA-256)

2531df85848e64b7788013c0d5741a22e37b7e7ee724a4e1b8ae7b80d13d75ba

Signature (Ed25519, base64)

+W2VmHEboTlME4HBe/pxP2hvuV7CYU93IudX5Y+6W/bSqSHa/cC8WOJp7hrVZKOx/5xjo1QK0HRmVpdLvDfOBA==

Merkle root

afb9ffbb4b4e88017e1c868247f919ebcfe69f09127d391e7daa08019eb2b63b

Merkle path

["2531e10895715206b883c7a0e080d11f7d9135921467c39dca7ae45db60ecda7","b1dd2dbcecef3b5c9cf29135b080723b55c9754745e973e0e44050ac8ebc6cc8","3ed4da225336918147992b261d931362a121dad0376f1b3adc85eb63d8b6e883","cd28bcca721286f8a0041def4b2b7f492b70c73286ee9d139c3bf7d5f0cad94f","634260bbe0c73376a09a18ee3cca73d29fb06f8e1de3cf49b981f4ca234f12b8","b2eac184c232111dbdd3194b7c34cf69e6630c05e7d77374a52f7396dca443f7","d00b20bcb98e1b41f10791f2f77ea6d836922d63b6a3b3f8af5128c64d43ff87","edc924e8d24173851ded167fd90fee230507775aa8176a8d44de03c958f0e7d7","74d140d8566bf80fb83d11abba7be8db9d8fab78b21f4af8486dc033f64cd1cf","71bd130de45707ab98c550eab03b0447b4b4f0e3ebb413a01e15a5ad1f7620ac","f83944b16fbf43a8904cde916c26d245f82f3fecd41aad7e2fe680a6de8825bf","e7d5f6e88126b47f3ee25c7741cdcaebb40c6bcd9d35a859108e3ac93e8a0b29","09648cb4275ce9eb9f26709778da1b3653a6ea84465537d5f6fe5c1b17d3cea0","15ecb20ce6559654c94b8b858c027c014996a92eb19771813db0b794d6214fb6","72bbc4ee0a973113b1d556f76d02fea2c4704794a0d313a96e49ff7b6174dec2"]

Anchored

2026-10-10

Public log entry

search.sigstore.dev, log index 3178115911 · entry 108e9186e8c5677a2bba…

Expected log hash

a144ffc32dfaa9fe45b4895b7f4c17280667152868dd8de227ca2811c60c870f 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":"v1791604579182","kind":"published-quote","locale":"en","page":"brand:spotify","quote":"One song, then four new ads.","rating":1,"review_date":"2026-09-20","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.spotify.music","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 (afb9ffbb4b4e…), 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.