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

Block 19641

Hash
000000229375c528a9a18365f6da4d153086303cc6a7812c5d397f786be3176d
Confirmations
22646
Time
2026-10-10 18:40:57 UTC
Median time
2026-10-10 18:32:48 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
c57a161110a4c283423f791392a3d67a4967baf64f0adbf9f1523fcfc71cb45f
Previous block
0000001130dbece8f5c970b75ba112431b599a62023723d33f0c2671da17c0e2
Next block
000000ec991d6bc1fbe561aaedc77291f49a97bd76a5b76f99bab7f7f7f3136e

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 19641 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
b08be4cbb2a885b7a240d99bd9007bce… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
c57a161110a4…3fcfc71cb45f coinbase1250