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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.

A Signature Snout!

Models & Coffee · 18 Sept 2026

Stamp ID
STAMP-2026-0918-CXZKBIMN
Content hash
969fbd88e28e0694595fdce9301a169af4701b11608c5f8f35db3d3576aa90ed
Day recorded
2026-09-18
Articles recorded that day
13
Attestation UID
0x99cf5acde28f98446b07d9f381ccf6b9dc4ff37ce0871d10b54a80bdb98095de
View on EAS
Transaction
0x61ee343cde25983c3ac3ae4c39e621400f411eefee4b607c85dfd170f3bd4190
View on Basescan
Stamped
19 Sept 2026

Recorded on Base using canonicalization v2 and record format v1.

How this article reaches the blockchain

It was combined with the other 12 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
0xe9c56d0cd99ffe6ea7c4611f8f008746fda79434becdf37a225d6ecbfbe51ed3

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 before it
    0xdea3bc2b31f78b0c101037016f874658c85447b60656cdc723e5b134649e9e18
    0x0ee648564768ab18f3c76946c5ab8bbfba1eda3cc6fc189668c8c0f6c83675e8
  2. Step 2, combined with the value before it
    0x53ea9f884a22b0011ee075cd67150735031e7933c645aaa3a19025061e03c73f
    0x5efa147f8faed0ca5841e77faa0ffff3d6cc572454045c0a169421072f2b3e95
  3. Step 3, combined with the value after it
    0x471bdea54bc032b0fd712551a69a32f04864f336672933d0cb8110aaa8286e64
    0xa66ce1f1da049ece5c77c50b28daa4731b6ca2a516b6ac8e5a1ecc6941ecd1dc
  4. Step 4, combined with the value before it
    0x2179430ea0588befc303ccd6515f5da08e40ad99c24504fce746072a194ebe90
    0x31000bb3cfb7f251ad55feede69affff43f622fc9fb42c0589e9dd15b4607a51

    This is the value for the whole day.

Value these steps arrive at
0x31000bb3cfb7f251ad55feede69affff43f622fc9fb42c0589e9dd15b4607a51

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
0x31000bb3cfb7f251ad55feede69affff43f622fc9fb42c0589e9dd15b4607a51
Read from Base
0x31000bb3cfb7f251ad55feede69affff43f622fc9fb42c0589e9dd15b4607a51
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,"agreement":false,"authors":[{"identity":"singularity","position":1,"role":"solo","weight":1.0000}],"body":{"content":[{"content":[{"text":"A fingerprint for humans, a nose print for dogs! Very Interesting !!","type":"text"…

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-2026-0918-CXZKBIMN/canonical" | shasum -a 256

    Should print 969fbd88e28e0694595fdce9301a169af4701b11608c5f8f35db3d3576aa90ed

  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-2026-0918-CXZKBIMN CONTENT=969fbd88e28e0694595fdce9301a169af4701b11608c5f8f35db3d3576aa90ed DIGEST=$(printf '%s' "$STAMP" | shasum -a 256 | cut -d' ' -f1) printf '00%s%s' "$DIGEST" "$CONTENT" | xxd -r -p | shasum -a 256

    Should print e9c56d0cd99ffe6ea7c4611f8f008746fda79434becdf37a225d6ecbfbe51ed3

  3. 3. Combine step 1

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

    printf '01%s%s' "dea3bc2b31f78b0c101037016f874658c85447b60656cdc723e5b134649e9e18" "e9c56d0cd99ffe6ea7c4611f8f008746fda79434becdf37a225d6ecbfbe51ed3" | xxd -r -p | shasum -a 256

    Should print 0ee648564768ab18f3c76946c5ab8bbfba1eda3cc6fc189668c8c0f6c83675e8

  4. 4. Combine step 2

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

    printf '01%s%s' "53ea9f884a22b0011ee075cd67150735031e7933c645aaa3a19025061e03c73f" "0ee648564768ab18f3c76946c5ab8bbfba1eda3cc6fc189668c8c0f6c83675e8" | xxd -r -p | shasum -a 256

    Should print 5efa147f8faed0ca5841e77faa0ffff3d6cc572454045c0a169421072f2b3e95

  5. 5. Combine step 3

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

    printf '01%s%s' "5efa147f8faed0ca5841e77faa0ffff3d6cc572454045c0a169421072f2b3e95" "471bdea54bc032b0fd712551a69a32f04864f336672933d0cb8110aaa8286e64" | xxd -r -p | shasum -a 256

    Should print a66ce1f1da049ece5c77c50b28daa4731b6ca2a516b6ac8e5a1ecc6941ecd1dc

  6. 6. Combine step 4

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

    printf '01%s%s' "2179430ea0588befc303ccd6515f5da08e40ad99c24504fce746072a194ebe90" "a66ce1f1da049ece5c77c50b28daa4731b6ca2a516b6ac8e5a1ecc6941ecd1dc" | xxd -r -p | shasum -a 256

    Should print 31000bb3cfb7f251ad55feede69affff43f622fc9fb42c0589e9dd15b4607a51

  7. 7. 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.easscan.org/attestation/view/0x99cf5acde28f98446b07d9f381ccf6b9dc4ff37ce0871d10b54a80bdb98095de

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

Read the specification