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

Block 19722

Hash
0000010cf8189302e6e36bbf3a835257dbb2ef912f5b413220fded46978e0cc6
Confirmations
22097
Time
2026-10-10 20:57:45 UTC
Median time
2026-10-10 20:49:10 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
0d40a426830a205a06df84ecc66f56b37265e48179c94618d3d8390b8bb2ec3a
Previous block
0000001bf0ca5fc58d168f1fa2ac2884ce370a1c0600ae686eac5ea4d8e49de8
Next block
00000042f3d4fd033f68e271fe65deb0def661c62b91ea09c80657c5aaae14fa

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 19722 is below the activation height 20000: nodes do not require this signature, and only log the result of checking it when run with -debug=validation. The block producer adds it from height 18000 on, so that nodes can check it before it is required.

Status
In the form M2 requires, followed by the signet solution push (the classical signature)
Signature
128ee120c567a1c6d54359d47b64908d… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
0d40a426830a…390b8bb2ec3a coinbase1250