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

Block 19307

Hash
000000d74e999d3e79058e7728b6d166bec817c9b879365913aa6372972cff6b
Confirmations
21519
Time
2026-10-10 09:20:12 UTC
Median time
2026-10-10 09:11:43 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
c64c9ae8d64fd3d75e9d1ba7764a627d1f17cc087a426e089a9eacb75d922a11
Previous block
000000661baee0e10a22137cff90e297ae8b89054327047575e34ed5f3424b25
Next block
000001168f587148af6ebc6c048685d3d4f8b6a76f9ae6c6d2562c62c7afa775

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 19307 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
a42ce15940d0b38a2f165b1fa85cb105… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
c64c9ae8d64f…acb75d922a11 coinbase1250