Black Lagoon
type: MusicGroup
description: Black Lagoon (stylized in all caps) is a Japanese manga series written and illustrated by Rei Hiroe. It has been published in Shogakukan's manga magazine Monthly Sunday Gene-X since April 2002, with
popularity: 2
followers: 112
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc0caa9575787c5490d65266205090fb20434d9b8110d7dc8aadc7c4277e0ebd6
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/db5b2622-c354-4186-8555-c67f0852ed21.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/db5b2622-c354-4186-8555-c67f0852ed21.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/db5b2622-c354-4186-8555-c67f0852ed21
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc0caa9575787c5490d65266205090fb20434d9b8110d7dc8aadc7c4277e0ebd6","name":"Black Lagoon","registered_at":"2026-06-21T04:48:17Z","symbol":"NIM1824604","token_address":"0x17ccda7f8fbd31b5a2f41678da1b49d7fb2241aa","type":"artist","uuid":"db5b2622-c354-4186-8555-c67f0852ed21"}
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 0xc0caa9575787c5490d65266205090fb20434d9b8110d7dc8aadc7c4277e0ebd6. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db5b2622-c354-4186-8555-c67f0852ed21.json and https://artists.proofprofile.net/proofs/artist/db5b2622-c354-4186-8555-c67f0852ed21.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0xc0caa9575787c5490d65266205090fb20434d9b8110d7dc8aadc7c4277e0ebd6","name":"Black Lagoon","registered_at":"2026-06-21T04:48:17Z","symbol":"NIM1824604","token_address":"0x17ccda7f8fbd31b5a2f41678da1b49d7fb2241aa","type":"artist","uuid":"db5b2622-c354-4186-8555-c67f0852ed21"}
album: The Ruthless Workings of Nature
  type: MusicAlbum
  date published: 2008-01-01
album: Laguna Negra
  type: MusicAlbum
  date published: 2023-09-29