Ark-0
Ark-0 is a test network for trying things out. It may be reset at any time.

Block 21121

Hash
0000004c3869d502cc21119714452ba62a901ab41100762962203476f8259462
Confirmations
19723
Time
2026-10-12 11:40:54 UTC
Median time
2026-10-12 11:33:02 UTC
Transactions
2
Size
2,977
Weight
11,596
Difficulty
0.0031405554
Bits
1e013e69
Merkle root
15fd70abeb14d6c07160b17b5d930d491c0b36a5ae549991959a13a176b656b5
Previous block
000001084307cf0c7395c3e104e7d1472f51365b0b469dd4417f9f88ff02d30b
Next block
000000f050c9909fd0c116b5b4402a39316c9fa7e2d5aa6573620256b3503e03

ML-DSA-44 block signature (M2)

M2 is an experimental rule of this test network. From a height set in its build, a node that enforces M2 accepts a block only if, besides the classical signet signature, the block carries a valid ML-DSA-44 signature by the Ark-0 block key, in its coinbase's witness commitment output. This page shows that signature; it does not check it.

Block 21121 is at or above the activation height 20000: nodes that enforce M2 accept a block there only with a valid ML-DSA-44 block signature.

The node behind this site enforces M2 and holds this block, so its block signature passed the node's check.

Status
In the form M2 requires, followed by the signet solution push (the classical signature)
Signature
cbcf9fe75790f499fdabbd9b14866134… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
fc19a1adaeab…5d158e4c944d coinbase1250.0000031
ac0881c6d27b…79183d62b303 pays to P2MR1219.99990370.0000031