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

Block 18922

Hash
0000004309b39f02cbe961b31583cbefad2c5a9c3f46daa358623d1fc1470b38
Confirmations
22122
Time
2026-10-09 22:27:25 UTC
Median time
2026-10-09 22:19:20 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
1bec8c9c5d58b1354e26dd993d595daff7573241309fbb7cf347ec2e8443696a
Previous block
0000007ec99998357d766869bd85009a9e91ac3620e50bc3881a20bfcec8653c
Next block
0000002eadb4394084321b672fd1fadcf5d301fa7f52c9d113ad7fe2f38a372a

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 18922 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
d61886346dade812d3ef58d400f237f9… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
1bec8c9c5d58…ec2e8443696a coinbase1250