Heidra
type: MusicGroup
genre: folk metal
genre: melodic death metal
genre: pirate metal
genre: power metal
popularity: 9
followers: 3359
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x67e60545499f8b35e7525a3dfdb3012271fda3de8d92d25c9d42da083c8da324
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953947
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953947
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/23df9dac-be45-4cce-b7c5-056f7e088533.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/23df9dac-be45-4cce-b7c5-056f7e088533.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/23df9dac-be45-4cce-b7c5-056f7e088533
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T13:14:26Z
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 0x67e60545499f8b35e7525a3dfdb3012271fda3de8d92d25c9d42da083c8da324. Chain 2 (Bitcoin): anchored in block 953947 (2026-06-16T13:14:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/23df9dac-be45-4cce-b7c5-056f7e088533.json and https://artists.proofprofile.net/proofs/artist/23df9dac-be45-4cce-b7c5-056f7e088533.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T13:14:26Z
album: Sworn to Vengeance
  type: MusicAlbum
  date published: 2012-10-29
album: Sworn to Vengeance
  type: MusicAlbum
  date published: 2012-10-29
album: Sworn to Vengeance
  type: MusicAlbum
  date published: 2012-10-29
album: Awaiting Dawn
  type: MusicAlbum
  date published: 2014-06-16
album: Awaiting Dawn
  type: MusicAlbum
  date published: 2014-06-16
album: Lone Warrior
  type: MusicAlbum
  date published: 2017-01-20
album: The Blackening Tide
  type: MusicAlbum
  date published: 2018-10-27
album: Dusk
  type: MusicAlbum
  date published: 2022-01-14
album: Wolfborn Rising
  type: MusicAlbum
  date published: 2022-02-18
album: To Hell Or Kingdom Come
  type: MusicAlbum
  date published: 2022-03-25
album: To Hell or Kingdom Come
  type: MusicAlbum
  date published: 2022-04-08