Verify

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.

Test

dock30 · 24 Aug 2026

Stamp ID
STAMP-2026-0824-FT5IWSFB
Content hash
8c393c57ad8cd953d200805fae9715b9f697877de8e6b4d24eeffac009fcd55e
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
0x9b98f5d8c28d176f6b1d7ae3a0056b4d6e7c4ddc8ce05984be63c72fc71d0b8a

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
    0xf3ad531f5302c9be60e58728a2c3f606f97042a32ece9f2667d01b89de634f59
    0x3d82e4bf59509208c59d40442922cdebcc95d0ec00415a9fba19f7b00a46c564
  2. Step 2, combined with the value before it
    0xa6d88fc35ad9f650a4b76b7b7f85e0692469d36a882878749e6dcf1231f57f5e
    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":"test","authors":[{"identity":"dock30","position":1,"role":"solo","weight":1.0000}],"body":{"content":[{"content":[{"text":"Test","type":"text"}],"type":"paragraph"}],"type":"doc"},"keywords":["tes"],"publishedAt":"2026-08-24T10…

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-FT5IWSFB/canonical" | shasum -a 256

    Should print 8c393c57ad8cd953d200805fae9715b9f697877de8e6b4d24eeffac009fcd55e

  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-FT5IWSFB CONTENT=8c393c57ad8cd953d200805fae9715b9f697877de8e6b4d24eeffac009fcd55e DIGEST=$(printf '%s' "$STAMP" | shasum -a 256 | cut -d' ' -f1) printf '00%s%s' "$DIGEST" "$CONTENT" | xxd -r -p | shasum -a 256

    Should print 9b98f5d8c28d176f6b1d7ae3a0056b4d6e7c4ddc8ce05984be63c72fc71d0b8a

  3. 3. Combine step 1

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

    printf '01%s%s' "9b98f5d8c28d176f6b1d7ae3a0056b4d6e7c4ddc8ce05984be63c72fc71d0b8a" "f3ad531f5302c9be60e58728a2c3f606f97042a32ece9f2667d01b89de634f59" | xxd -r -p | shasum -a 256

    Should print 3d82e4bf59509208c59d40442922cdebcc95d0ec00415a9fba19f7b00a46c564

  4. 4. Combine step 2

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

    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