# A Guide to Blockchain Easter Eggs: What "Memes" Did b10c...eb5d Play?

> **In the Bitcoin world, some transactions are more than just transfers of funds—they are multi-layered Easter eggs packed with technology, history, and culture. This article walks you through all the hidden details behind the legendary Easter egg transaction: b10c...eb5d.**

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## Preface: When a Transaction Becomes Art

Most transactions on the blockchain are simple transfers of value. However, within the Bitcoin ecosystem, masterfully crafted "Easter egg transactions" occasionally appear. These leverage protocol quirks, historical events, technical curiosities, and cultural memes to create artworks specifically designed for Bitcoin maximalists.

The b10c...eb5d transaction is exactly such a masterpiece.

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## Core Easter Eggs at a Glance

| Easter Egg Type | Example | Description |
| :-------------: | :--------------------: | :------------------------------: |
| Block Height Meme | 850000 | Corresponds to the 850,000 BTC stolen from Mt. Gox |
| Timestamp Meme | 1231006505 | The Genesis block timestamp |
| TXID Vanity | b10c0000...eb5d | A tribute to developer b10c |
| Witness Vanity | Multiple leading 0s | Extremely rare low-difficulty hashes |
| Full Script Type Collection | P2PK ~ P2TR | Covers nearly all Bitcoin script types in history |
| Input Amount Easter Eggs | e.g., 6102, 1913, 2140 | Corresponds to historical events and vulnerability IDs |
| Output Amount Easter Eggs | 576, 546, 582, etc. | Various dust limit boundary values |
| nSequence Easter Eggs | e.g., 20090103, 21000000 | Major milestone dates in Bitcoin's history |
| Signature Length Grinding | 71 ~ 57 bytes | Achieved extreme compression via signature grinding |
| SIGHASH Full Collection | ALL, NONE, SINGLE, etc. | Utilized all signature hash modes |
| OP_RETURN Easter Eggs | OP_PUSHNUM_1 ~ 16 | OP_RETURN packed with PUSH instructions |
| Public Key Mix | Compressed & Uncompressed | Showcases early vs. modern public key formats |
| Historical Public Key Tributes | Hal Finney, vanity public keys, etc. | Multiple historical public key replicas |
| Merkle Tree Depth | 21-layer classic transactions | A rare Taproot Merkle Easter egg depth record |

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## Detailed Appreciation

### 1. Embedding Historical Key Information

| Item | Content | Background |
| :---------------------- | :--- | :------------- |
| **850000** | Block height | The number of BTC stolen from the Mt. Gox hack |
| **LockTime=1231006505** | Timestamp | The exact time the Genesis block was mined |
| **b10c...eb5d** | TXID | A vanity TXID acting as developer b10c's signature |

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### 2. The Complete Script Type Collection: A Bitcoin Evolution Timeline

| Script Type | Origin | Description |
| :-------------- | :---------------- | :-------------------- |
| P2PK | Earliest era | A legacy from the 2009 early mining era |
| P2PKH | Mainstream adoption | The standard "Bitcoin address" format |
| P2SH | BIP16 | Introduced multisig and complex scripts |
| P2WPKH / P2WSH | BIP141 (SegWit) | The new low-fee standard |
| P2TR | Taproot | The latest major protocol upgrade |
| OP_RETURN | Memo purposes | Used for Easter eggs and arbitrary data embedding |
| SegWit v1 2-byte anchor | Ephemeral Anchors | An experimental minimal witness program |

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### 3. The Stories Behind the Amounts

| Amount | Historical Reference | Description |
| :------------------ | :---------- | :----------- |
| 6102 | Ban on private gold ownership | Refers to U.S. Executive Order 6102 of 1933 |
| 1913 | Federal Reserve established | Marks the birth of the modern U.S. dollar system |
| 2140 | Bitcoin's last halving | The year of Bitcoin's ultimate deflation |
| 9001 | Dragon Ball meme | "It's over 9000!" |
| 5139 / 3220 / 17144 | Bitcoin security vulnerability IDs | A retrospective on major system vulnerabilities |
| 8149 | SegWit implementation PR | GitHub code evolution milestone |
| 19953 | Taproot implementation PR | The Taproot soft fork implementation milestone |

---

### 4. nSequence Fun Encoding

| Value | Source | Meaning |
| :------------------- | :------ | :---------------------------- |
| 20090103 | Genesis block date | The day the network launched |
| 20081031 | White paper publication date | The release of Satoshi's original document |
| 19750504 | Satoshi's self-reported birthday | A nod to the creator's P2P Foundation profile |
| 21000000 | Bitcoin total supply | The hard cap on Bitcoin issuance |
| 0xdeadbeef | Magic number | A common software debugging symbol |
| 0xf9beb4d9 | Bitcoin network magic number | The identifier for the Bitcoin mainnet |
| 16 / 141 / 341 / 342 | BIP numbers | Corresponding to P2SH, SegWit, Taproot, and Tapscript |

---

### 5. Signature Grinding & SIGHASH Full Achievement Unlocked

- Shortest signature length: 57 bytes.
- Signature grinding technique: Combined signature grinding with special r-values.
- SIGHASH modes used: Achieved the full collection of available modes.

---

### 6. Cultural Easter Egg: The 5/7 Meme

- P2TR utilizes a 5-of-7 multisig structure as a cultural Easter egg.
- Origin: An internet meme originating from a Facebook post where someone rated the movie *Fight Club* a "perfect 5/7."

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  <img src="./img/57.jpg" style="zoom:42%;" />
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### 7. Historical Public Key Memorial

- Includes the Genesis block coinbase public key.
- Includes the Block height 9 coinbase public key.
- Replicates Hal Finney's first transaction public key.
- Features the first Taproot transaction vanity public key.
- Uses the SHA-256 hash of the Bitcoin white paper as an internal key.

---

### 8. Merkle Tree Depth 21 — A Bitcoin History Museum

| Classic Transaction | Brief Description |
| :------------ | :------------- |
| Genesis Block | The absolute starting point of Bitcoin |
| First Transaction | Satoshi sending coins to Hal Finney |
| Pizza Transaction | The legendary 10,000 BTC paid for two pizzas |
| BIP-30 Duplicate TXID | A notable historical protocol vulnerability |
| F2Pool Giant Transaction | A massive transaction that challenged validation performance |
| 291 BTC Astronomical Fee | The record for the highest transaction fee ever paid |
| White Paper Embedded Transaction | A fusion of technology and core belief |
| Rickroll | A classic internet Easter egg culture reference |
| SHA1 Bounty Crack | A tribute to a major cryptography challenge |

*(Partial list abbreviated for length)*

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## Summary: The True Bitcoin Hacker Spirit

> **"The b10c...eb5d transaction is like a grand Easter egg feast in Bitcoin history, condensing protocol history, vulnerability evolution, cultural memes, and cryptographic geek spirit into a single TXID."**

Beyond the technical details, it serves as a **cryptographic monument** written for all Bitcoiners—a kind of digital romance that can only be fully appreciated by those who have earnestly studied the Bitcoin protocol and its surrounding culture.

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## References

- [b10c...eb5d played which "memes"?](https://justloseit.top/b10ceb5d%E7%8E%A9%E6%A2%97)
- [Analysis of 0xB10C's weird bitcoin transaction](https://stacker.news/items/593226)
- [Definitive explanation of my weird Bitcoin transaction](https://stacker.news/items/600187)
- [On anyone-can-spend Pay-to-Taproot outputs before activation](https://b10c.me/blog/007-spending-p2tr-pre-activation)
- [Ephemeral anchors](https://bitcoinops.org/en/topics/ephemeral-anchors)
- [Value overflow incident](https://en.bitcoin.it/wiki/Value_overflow_incident)
- [What does the special form of the base point of secp256k1 allow?](https://crypto.stackexchange.com/questions/60420/what-does-the-special-form-of-the-base-point-of-secp256k1-allow)
- [The Megatransaction: Why Does It Take 25 Seconds?](https://rusty.ozlabs.org/2015/07/08/the-megatransaction-why-does-it-take-25-seconds.html)

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