Hydra
type: MusicGroup
genre: album rock
description: Hydra generally refers to: Lernaean Hydra, a many-headed serpent in Greek mythology Hydra (genus), a genus of simple freshwater animals belonging to the phylum Cnidaria Hydra or The Hydra may also
popularity: 2
followers: 113
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa6f7fca8e0b18fefcd819587d88df33323a5a995b615efb225a934d6185dea1d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954500
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954500
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9c99fcb1-264f-43c4-96a2-d38f37b4b0d6.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9c99fcb1-264f-43c4-96a2-d38f37b4b0d6.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/9c99fcb1-264f-43c4-96a2-d38f37b4b0d6
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T04:47:29Z
additional property: OTSCanonicalRecord
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f7fca8e0b18fefcd819587d88df33323a5a995b615efb225a934d6185dea1d. Chain 2 (Bitcoin): anchored in block 954500 (2026-06-20T04:47:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c99fcb1-264f-43c4-96a2-d38f37b4b0d6.json and https://artists.proofprofile.net/proofs/artist/9c99fcb1-264f-43c4-96a2-d38f37b4b0d6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T04:47:29Z
album: Rock Experience
  type: MusicAlbum
  date published: 2006-09-01
album: This Famous Unknown
  type: MusicAlbum
  date published: 2009-12-19
album: The Special One
  type: MusicAlbum
  date published: 2010-05-04
album: Kingdom of Ignorance
  type: MusicAlbum
  date published: 2013-06-22
album: OUTER BODY DELUXE
  type: MusicAlbum
  date published: 2020-11-15