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Verified on Base

This article has not changed since Vitahash recorded it on the Base blockchain. Everything below can be checked without taking our word for any of it.

New in JACC: AI-ECG performance drops

dock30 · 24 Aug 2026

Stamp ID
STAMP-2026-0824-2FNJUI7E
Content hash
81a31bf7dd05ce28a43ab77d9b79ceae7c3f5258f25ae54b183f45f1c4a27bbc
Day recorded
2026-08-25
Articles recorded that day
4
Attestation UID
0xfb4434f52c00d4195ae8e38dddbf5a3015a09a7a2c4504a9f0d4864ea48a2c58
View on EAS
Transaction
0x78f709ab5a6c07d3a0b7e86073eeae656bb931e4aae9e9c0c3a4ec1f6e718222
View on Basescan
Stamped
25 Aug 2026

Recorded on Base Sepolia using canonicalization v1 and record format v1.

How this article reaches the blockchain

It was combined with the other 3 articles published that day, one step at a time, until the whole day became a single value. That one value is what Vitahash wrote to the blockchain. Change a single character of this article and the starting value below changes, so none of the steps would land on the recorded one.

Starting value for this article
0x90a7e3598911f05ab0e13a557db357d8a0f39c8012aee2fd1b9e22103a90a363

Built from this article's content hash and its stamp ID, as sha256(0x00 || sha256(utf8(stampId)) || contentHash).

  1. Step 1, combined with the value after it
    0xce8a8c2abe1c5b8a1b6c64f3314b64c5309f95c4c0e9b99ce250632d1f817761
    0xa6d88fc35ad9f650a4b76b7b7f85e0692469d36a882878749e6dcf1231f57f5e
  2. Step 2, combined with the value after it
    0x3d82e4bf59509208c59d40442922cdebcc95d0ec00415a9fba19f7b00a46c564
    0x7e5c511e90490f0219d3332388967eaf9c486190ee686000be4e9034cab6ae55

    This is the value for the whole day.

Value these steps arrive at
0x7e5c511e90490f0219d3332388967eaf9c486190ee686000be4e9034cab6ae55

What the blockchain says

Two values, reached two different ways. The one above was worked out from this article. The one below was read back from the record on Base.

Worked out from this article
0x7e5c511e90490f0219d3332388967eaf9c486190ee686000be4e9034cab6ae55
Read from Base
0x7e5c511e90490f0219d3332388967eaf9c486190ee686000be4e9034cab6ae55
Read it yourself on EAS

They are the same value, so this article was published that day with exactly the text above.

Check it yourself

Every number on this page came from Vitahash. Copy the article's exact text below and check it against the hash above, using any SHA-256 tool.

{"abstract":null,"authors":[{"identity":"dock30","position":1,"role":"solo","weight":1.0000}],"body":{"content":[{"content":[{"text":"This looks good","type":"text"}],"type":"paragraph"}],"type":"doc"},"keywords":[],"publishedAt":"2026-08-2…

Copy this text, paste it into any SHA-256 tool, and compare the result with the hash shown above. If the two match, this is exactly what Vitahash recorded.

For a technical reader: the terminal route

  1. 1. Hash the article yourself

    This downloads the exact text Vitahash hashed, in the exact form it hashed it, and hashes it again on your machine. Nothing Vitahash wrote runs here.

    curl -s "https://api.vitahash.org/api/verify/STAMP-2026-0824-2FNJUI7E/canonical" | shasum -a 256

    Should print 81a31bf7dd05ce28a43ab77d9b79ceae7c3f5258f25ae54b183f45f1c4a27bbc

  2. 2. Build this article's starting value

    The stamp ID is folded in with the hash, so one article's record can never stand in for another's.

    STAMP=STAMP-2026-0824-2FNJUI7E CONTENT=81a31bf7dd05ce28a43ab77d9b79ceae7c3f5258f25ae54b183f45f1c4a27bbc DIGEST=$(printf '%s' "$STAMP" | shasum -a 256 | cut -d' ' -f1) printf '00%s%s' "$DIGEST" "$CONTENT" | xxd -r -p | shasum -a 256

    Should print 90a7e3598911f05ab0e13a557db357d8a0f39c8012aee2fd1b9e22103a90a363

  3. 3. Combine step 1

    The value you have goes first, then the published value.

    printf '01%s%s' "90a7e3598911f05ab0e13a557db357d8a0f39c8012aee2fd1b9e22103a90a363" "ce8a8c2abe1c5b8a1b6c64f3314b64c5309f95c4c0e9b99ce250632d1f817761" | xxd -r -p | shasum -a 256

    Should print a6d88fc35ad9f650a4b76b7b7f85e0692469d36a882878749e6dcf1231f57f5e

  4. 4. Combine step 2

    The value you have goes first, then the published value.

    printf '01%s%s' "a6d88fc35ad9f650a4b76b7b7f85e0692469d36a882878749e6dcf1231f57f5e" "3d82e4bf59509208c59d40442922cdebcc95d0ec00415a9fba19f7b00a46c564" | xxd -r -p | shasum -a 256

    Should print 7e5c511e90490f0219d3332388967eaf9c486190ee686000be4e9034cab6ae55

  5. 5. Compare with the blockchain

    The last value above is what the whole day came to. Read the record on Base and check its merkleRoot field is the same. Vitahash is not involved in this step at all.

    https://base-sepolia.easscan.org/attestation/view/0xfb4434f52c00d4195ae8e38dddbf5a3015a09a7a2c4504a9f0d4864ea48a2c58

The rules these commands follow are written down in full, so anyone can reimplement them.

Read the specification