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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.

See New York City From Above at Top of the Rock

Cozy Game Diary · 8 Nov 2026

Stamp ID
STAMP-2026-1108-6W6WB5DL
Content hash
fe487d5817b5b3543987c3f96d9d22130f35774e9f4fa87e42a352b7036652a7
Day recorded
2026-11-09
Articles recorded that day
15
Attestation UID
0x1bb2e246680a04397b432d223734470d6ce47b75c89b35e7f7092df08b007c08
View on EAS
Transaction
0x0d6604a01395a1e7bd8141dba86ad9a0243b7713d0e2512c8cebfca881037e5e
View on Basescan
Stamped
9 Nov 2026

Recorded on Base using canonicalization v2 and record format v1.

How this article reaches the blockchain

It was combined with the other 14 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
0x225f8e3a75506eeb768000a5d6550c1a920206b7d632d78372e510150b3c1393

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
    0xa745545950b97cd729abc9d56b14546f2a2450815ce20f8dfc546cb92dafe651
    0x6703e3fd6313811f5cb88ed6b695146fdb288da718198839d802e8bd29c6a577
  2. Step 2, combined with the value after it
    0xfe6d3efb82bafd149fbf3f8f6fb939427693ef38c7bcdea3a6b6de51e5ca3148
    0x3dd8e523004924f4f3c99bbacb87748d68aa3701b6159f943b0d9e590d68a89d
  3. Step 3, combined with the value before it
    0x7eb2ed0e0e18b94e3952996c961cbc2bfe8937a0a3a7ee01561ecd69585eb12e
    0x1af48d2f24d3b4525281700797451b50c58cc07806552eb1cc2e7d2dd141b158
  4. Step 4, combined with the value after it
    0x48bb8d36bc9e4989e1abd7db5b8019afde13c7ba60804c888de69b70b630cfd7
    0x633ebd26ef3198219cdb8a14837c36de2d43289e37d57c1b0e4544bfc4cc76dd

    This is the value for the whole day.

Value these steps arrive at
0x633ebd26ef3198219cdb8a14837c36de2d43289e37d57c1b0e4544bfc4cc76dd

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
0x633ebd26ef3198219cdb8a14837c36de2d43289e37d57c1b0e4544bfc4cc76dd
Read from Base
0x633ebd26ef3198219cdb8a14837c36de2d43289e37d57c1b0e4544bfc4cc76dd
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":"harvesthealth","position":1,"role":"solo","weight":1.0000}],"body":{"content":[{"content":[{"text":"Top of the Rock !!","type":"text"}],"type":"paragraph"}],"type":"doc"},"disclosur…

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-2026-1108-6W6WB5DL/canonical" | shasum -a 256

    Should print fe487d5817b5b3543987c3f96d9d22130f35774e9f4fa87e42a352b7036652a7

  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-2026-1108-6W6WB5DL CONTENT=fe487d5817b5b3543987c3f96d9d22130f35774e9f4fa87e42a352b7036652a7 DIGEST=$(printf '%s' "$STAMP" | shasum -a 256 | cut -d' ' -f1) printf '00%s%s' "$DIGEST" "$CONTENT" | xxd -r -p | shasum -a 256

    Should print 225f8e3a75506eeb768000a5d6550c1a920206b7d632d78372e510150b3c1393

  3. 3. Combine step 1

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

    printf '01%s%s' "225f8e3a75506eeb768000a5d6550c1a920206b7d632d78372e510150b3c1393" "a745545950b97cd729abc9d56b14546f2a2450815ce20f8dfc546cb92dafe651" | xxd -r -p | shasum -a 256

    Should print 6703e3fd6313811f5cb88ed6b695146fdb288da718198839d802e8bd29c6a577

  4. 4. Combine step 2

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

    printf '01%s%s' "6703e3fd6313811f5cb88ed6b695146fdb288da718198839d802e8bd29c6a577" "fe6d3efb82bafd149fbf3f8f6fb939427693ef38c7bcdea3a6b6de51e5ca3148" | xxd -r -p | shasum -a 256

    Should print 3dd8e523004924f4f3c99bbacb87748d68aa3701b6159f943b0d9e590d68a89d

  5. 5. Combine step 3

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

    printf '01%s%s' "7eb2ed0e0e18b94e3952996c961cbc2bfe8937a0a3a7ee01561ecd69585eb12e" "3dd8e523004924f4f3c99bbacb87748d68aa3701b6159f943b0d9e590d68a89d" | xxd -r -p | shasum -a 256

    Should print 1af48d2f24d3b4525281700797451b50c58cc07806552eb1cc2e7d2dd141b158

  6. 6. Combine step 4

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

    printf '01%s%s' "1af48d2f24d3b4525281700797451b50c58cc07806552eb1cc2e7d2dd141b158" "48bb8d36bc9e4989e1abd7db5b8019afde13c7ba60804c888de69b70b630cfd7" | xxd -r -p | shasum -a 256

    Should print 633ebd26ef3198219cdb8a14837c36de2d43289e37d57c1b0e4544bfc4cc76dd

  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/0x1bb2e246680a04397b432d223734470d6ce47b75c89b35e7f7092df08b007c08

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

Read the specification