Verify

Sign inSign up

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 visit to Ellis Island is a must when exploring NYC! 🗽

@NYCUnlocked · 5 Nov 2026

Stamp ID
STAMP-2026-1105-GAOUELBN
Content hash
4f42e1fed55521623e393b973a47be2dc80613a89a19125268551ac750f9bc58
Day recorded
2026-11-06
Articles recorded that day
12
Attestation UID
0xf18b4a820f1ceeeeb38ce9fccab69ef519d3effbb8d1bd928e7bcba4536cb592
View on EAS
Transaction
0x14693aefb1bbea4f15075a913bb23e04319b39086cdc62f7b9c08d1a2e5a89db
View on Basescan
Stamped
6 Nov 2026

Recorded on Base using canonicalization v2 and record format v1.

How this article reaches the blockchain

It was combined with the other 11 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
0xb7716355b7a0ac52f0507c421da51df63f93a1114dc902092f8018632811f627

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
    0xbf341b306f30303388a920467111e1c55018856eabaae26b314e6567a635e4ae
    0xfa660537d13745f9feb0d5cf2a19c9a035b7ac27187714ae44680183ef9ed1ab
  2. Step 2, combined with the value before it
    0x075090215c98875d132a02b1a93230b4db2741e5c5b1e4a45a7f1a493d56a4c6
    0xe156cfe28a9842521746b77acf0f16111e12e343f22b6d877577f6f6d01639e0
  3. Step 3, combined with the value after it
    0x0cf6688e1cdc08cbcaa58a4fd695e64c1564ae7fac0b7082d3f93984d4cbdc7b
    0x44df682a6023b81e87ff829ccca3e146cb12d98ec2a65d04100ea772c6deb9ef
  4. Step 4, combined with the value after it
    0xf119904624d5c3eec5a49f2357ad6ebe30995fe5bb8735024047c82ce6f4b376
    0xefb0a2841ae86a42f2cad5934d41fc3fe4e5eb0afa96bca6b150b3ea749097db

    This is the value for the whole day.

Value these steps arrive at
0xefb0a2841ae86a42f2cad5934d41fc3fe4e5eb0afa96bca6b150b3ea749097db

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
0xefb0a2841ae86a42f2cad5934d41fc3fe4e5eb0afa96bca6b150b3ea749097db
Read from Base
0xefb0a2841ae86a42f2cad5934d41fc3fe4e5eb0afa96bca6b150b3ea749097db
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":"NYCUnlocked","position":1,"role":"solo","weight":1.0000}],"body":{"content":[{"content":[{"text":"Step back in time and discover the stories of millions of immigrants who arrived in…

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-2026-1105-GAOUELBN/canonical" | shasum -a 256

    Should print 4f42e1fed55521623e393b973a47be2dc80613a89a19125268551ac750f9bc58

  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-2026-1105-GAOUELBN CONTENT=4f42e1fed55521623e393b973a47be2dc80613a89a19125268551ac750f9bc58 DIGEST=$(printf '%s' "$STAMP" | shasum -a 256 | cut -d' ' -f1) printf '00%s%s' "$DIGEST" "$CONTENT" | xxd -r -p | shasum -a 256

    Should print b7716355b7a0ac52f0507c421da51df63f93a1114dc902092f8018632811f627

  3. 3. Combine step 1

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

    printf '01%s%s' "b7716355b7a0ac52f0507c421da51df63f93a1114dc902092f8018632811f627" "bf341b306f30303388a920467111e1c55018856eabaae26b314e6567a635e4ae" | xxd -r -p | shasum -a 256

    Should print fa660537d13745f9feb0d5cf2a19c9a035b7ac27187714ae44680183ef9ed1ab

  4. 4. Combine step 2

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

    printf '01%s%s' "075090215c98875d132a02b1a93230b4db2741e5c5b1e4a45a7f1a493d56a4c6" "fa660537d13745f9feb0d5cf2a19c9a035b7ac27187714ae44680183ef9ed1ab" | xxd -r -p | shasum -a 256

    Should print e156cfe28a9842521746b77acf0f16111e12e343f22b6d877577f6f6d01639e0

  5. 5. Combine step 3

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

    printf '01%s%s' "e156cfe28a9842521746b77acf0f16111e12e343f22b6d877577f6f6d01639e0" "0cf6688e1cdc08cbcaa58a4fd695e64c1564ae7fac0b7082d3f93984d4cbdc7b" | xxd -r -p | shasum -a 256

    Should print 44df682a6023b81e87ff829ccca3e146cb12d98ec2a65d04100ea772c6deb9ef

  6. 6. Combine step 4

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

    printf '01%s%s' "44df682a6023b81e87ff829ccca3e146cb12d98ec2a65d04100ea772c6deb9ef" "f119904624d5c3eec5a49f2357ad6ebe30995fe5bb8735024047c82ce6f4b376" | xxd -r -p | shasum -a 256

    Should print efb0a2841ae86a42f2cad5934d41fc3fe4e5eb0afa96bca6b150b3ea749097db

  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/0xf18b4a820f1ceeeeb38ce9fccab69ef519d3effbb8d1bd928e7bcba4536cb592

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

Read the specification