Martin Brandqvist Quartet
type: MusicGroup
popularity: 22
followers: 287
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xfc78d797b742d0f64da88866e1dadd54c624ca77027bb865d50d15e71193471b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3c0f4b2f-e973-46ed-9bf5-b2af7cf1cb5f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3c0f4b2f-e973-46ed-9bf5-b2af7cf1cb5f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3c0f4b2f-e973-46ed-9bf5-b2af7cf1cb5f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xfc78d797b742d0f64da88866e1dadd54c624ca77027bb865d50d15e71193471b","name":"Martin Brandqvist Quartet","registered_at":"2026-06-11T17:12:03Z","symbol":"NIM0078331","token_address":"0x8fbc3f6a6a1ff830156c0452f6f391d9f83b278a","type":"artist","uuid":"3c0f4b2f-e973-46ed-9bf5-b2af7cf1cb5f"}
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc78d797b742d0f64da88866e1dadd54c624ca77027bb865d50d15e71193471b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c0f4b2f-e973-46ed-9bf5-b2af7cf1cb5f.json and https://artists.proofprofile.net/proofs/artist/3c0f4b2f-e973-46ed-9bf5-b2af7cf1cb5f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T21:20:00Z
  text: {"copyright_id":"0xfc78d797b742d0f64da88866e1dadd54c624ca77027bb865d50d15e71193471b","name":"Martin Brandqvist Quartet","registered_at":"2026-06-11T17:12:03Z","symbol":"NIM0078331","token_address":"0x8fbc3f6a6a1ff830156c0452f6f391d9f83b278a","type":"artist","uuid":"3c0f4b2f-e973-46ed-9bf5-b2af7cf1cb5f"}
album: Reflections
  type: MusicAlbum
  date published: 2016-11-18
album: Relations
  type: MusicAlbum
  date published: 2019-06-14
album: Relations
  type: MusicAlbum
  date published: 2019-12-03
album: Feet on the Ground
  type: MusicAlbum
  date published: 2020-09-25
album: Fingertips
  type: MusicAlbum
  date published: 2021-05-18
album: Any Time
  type: MusicAlbum
  date published: 2021-06-04
album: Free Salmon
  type: MusicAlbum
  date published: 2025-02-28
album: Like the sea breeze
  type: MusicAlbum
  date published: 2025-03-09
album: A Space In Between
  type: MusicAlbum
  date published: 2025-03-22
album: Like the sea breeze
  type: MusicAlbum
  date published: 2025-04-02