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

Block 19697

Hash
00000021b2d6b5ce038da58702e84c1a682b16fc7d15e2104e6593207a1af331
Confirmations
22286
Time
2026-10-10 20:15:34 UTC
Median time
2026-10-10 20:07:04 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
a220cbb8024a3528642fa1a4540f223e0a5aa62a39a5604b7f1d497d23d532ec
Previous block
000000dc8f03225826462765c58ea6ca0d40dd8fcd2d81e4b7e3ca3494377191
Next block
0000001d68a71c5b36136dc2aaa5a7dfd3d9472706db62513d7cc1813879bf61

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 19697 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
9db530f261622fd397894ff29c734245… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
a220cbb8024a…497d23d532ec coinbase1250