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

Block 19455

Hash
000000c3d6a67677927167915068fcb31c5917d223913de5d7e48a5e801e8280
Confirmations
21437
Time
2026-10-10 13:28:08 UTC
Median time
2026-10-10 13:19:51 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
46e0a6388df0b15102891afbedd6749e38d8976ad35b1aed0cf483ceb35e4ca2
Previous block
0000007fe844eadb2e8052ee4733682ef7425ccf55c6fde1154a180e17c65d07
Next block
000000709c5057a925ee244a27b19c92b17b71e23eb7405092dcc5ffe7cb9ca5

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 19455 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
52c9a2f4e59ff3ba84608c248c3fb3e3… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
46e0a6388df0…83ceb35e4ca2 coinbase1250