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

Block 19581

Hash
000000c2f788619815b9eaa5678340b4c096f43756131e115d007548698397a4
Confirmations
22485
Time
2026-10-10 16:59:13 UTC
Median time
2026-10-10 16:50:38 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
7b2df3006659d9046625787fae65c57277048e0e6d271e184ebf5818cf73a9e4
Previous block
000000d789f8a94291e8305d62a9a06c58babc1261dbefeaf573417f12e8fb48
Next block
000000d816bc6041445e85ad9d79967cb4ae1cf757c427e977bf882058f542d5

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 19581 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
6de8f1364385bac4da35c75b157bbce1… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
7b2df3006659…5818cf73a9e4 coinbase1250