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

Block 19103

Hash
000000cc0972de144fa4520fd9dfb58f8f04aa069fd11bfee00cc2745bae4759
Confirmations
21818
Time
2026-10-10 03:35:24 UTC
Median time
2026-10-10 03:26:46 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
09502e5cdce17963512e0407780d9949c3c961d1b2e35cb41513a7ea00716bbd
Previous block
000000dc98bff998c2e6cbab9a6b409b33eb862bdbd75e4391e888cf06263f86
Next block
0000002b437c9861aa935242ca5560f7eb001b924793c1820fec4ad9f8d58ba0

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 19103 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
b44feb751b65eeeef72377aecc6014d8… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
09502e5cdce1…a7ea00716bbd coinbase1250