Katakomba
type: MusicGroup
genre: death metal
popularity: 6
followers: 2109
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x070f1410a838578b390128a9488863dbf0a489a0b91c21b7005edf68597369c1
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954742
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954742
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fd9d05fa-8455-4904-aa40-ff3ba08dc5dd.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fd9d05fa-8455-4904-aa40-ff3ba08dc5dd.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/fd9d05fa-8455-4904-aa40-ff3ba08dc5dd
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T20:46:40Z
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 0x070f1410a838578b390128a9488863dbf0a489a0b91c21b7005edf68597369c1. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd9d05fa-8455-4904-aa40-ff3ba08dc5dd.json and https://artists.proofprofile.net/proofs/artist/fd9d05fa-8455-4904-aa40-ff3ba08dc5dd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T20:46:40Z
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  type: MusicAlbum
  date published: 2018-06-15
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  type: MusicAlbum
  date published: 2018-09-14
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  type: MusicAlbum
  date published: 2018-12-14
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  type: MusicAlbum
  date published: 2019-02-08
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  type: MusicAlbum
  date published: 2019-03-08
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  type: MusicAlbum
  date published: 2020-10-09
album: Cosmic Reflection
  type: MusicAlbum
  date published: 2022-02-18
album: Sacrifice
  type: MusicAlbum
  date published: 2022-05-27
album: Embalmed in Concrete
  type: MusicAlbum
  date published: 2022-07-01
album: Katakomba
  type: MusicAlbum
  date published: 2022-07-29
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  type: MusicAlbum
  date published: 2025-07-18
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  type: MusicAlbum
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album: The Second Death
  type: MusicAlbum
  date published: 2025-10-10