Hoffi Coffi
type: MusicGroup
genre: cool jazz
popularity: 11
followers: 75
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1f95930bd72f10407c5beb00e94d717b4b0395b88cb129ddf6d29df944aee98e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953807
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953807
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f52ff202-dbdb-45d7-898a-d3c50fb622c0.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f52ff202-dbdb-45d7-898a-d3c50fb622c0.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f52ff202-dbdb-45d7-898a-d3c50fb622c0
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T16:39:18Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x1f95930bd72f10407c5beb00e94d717b4b0395b88cb129ddf6d29df944aee98e","name":"Hoffi Coffi","registered_at":"2026-06-15T06:14:53Z","symbol":"NIM0707514","token_address":"0x2e3c1208ed8eed0d07a842014444431e5cb205b2","type":"artist","uuid":"f52ff202-dbdb-45d7-898a-d3c50fb622c0"}
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 0x1f95930bd72f10407c5beb00e94d717b4b0395b88cb129ddf6d29df944aee98e. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f52ff202-dbdb-45d7-898a-d3c50fb622c0.json and https://artists.proofprofile.net/proofs/artist/f52ff202-dbdb-45d7-898a-d3c50fb622c0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T16:39:18Z
  text: {"copyright_id":"0x1f95930bd72f10407c5beb00e94d717b4b0395b88cb129ddf6d29df944aee98e","name":"Hoffi Coffi","registered_at":"2026-06-15T06:14:53Z","symbol":"NIM0707514","token_address":"0x2e3c1208ed8eed0d07a842014444431e5cb205b2","type":"artist","uuid":"f52ff202-dbdb-45d7-898a-d3c50fb622c0"}
album: Hoffi Coffi
  type: MusicAlbum
  date published: 2022-09-18
album: Wyt Ti'n Hoffi Ymlacio?
  type: MusicAlbum
  date published: 2022-11-15
album: Coffi Cymraeg
  type: MusicAlbum
  date published: 2023-07-10
  track: Astudio Ieithoedd
    type: MusicRecording
    duration: PT2M25S
    duration ms: 145449
    explicit: false
    by artist: Hoffi Coffi
    in album: Coffi Cymraeg
      type: MusicAlbum
      date published: 2023-07-10
    genre: cool jazz
    isrc code: GX3HH2367502
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-03T15:11:35+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x5f6e9eb5d9449a1ffa240ae5972dc0c09eca23ad6234c36588500eca7ad74d7c
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956545
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956545
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX3HH2367502
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-03T19:59:51Z
    additional property: OTSVerifyInstructions
      type: PropertyValue
      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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 0x5f6e9eb5d9449a1ffa240ae5972dc0c09eca23ad6234c36588500eca7ad74d7c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX3HH2367502.
      date published: 2026-07-03T19:59:51Z
    audio: Astudio Ieithoedd
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 164.996
      additional property: Musical Key
        type: PropertyValue
        value: 6
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.685
      additional property: Energy
        type: PropertyValue
        value: 0.299
      additional property: Speechiness
        type: PropertyValue
        value: 0.044
      additional property: Acousticness
        type: PropertyValue
        value: 0.489
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.815
      additional property: Liveness
        type: PropertyValue
        value: 0.109
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.508
      additional property: Loudness (dB)
        type: PropertyValue
        value: -18.24
      additional property: Key Name
        type: PropertyValue
        value: F#
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Hoffi Coffi 2
  type: MusicAlbum
  date published: 2023-07-13
album: Hoffi Coffi 3
  type: MusicAlbum
  date published: 2024-06-26
album: Bossa Patagonia
  type: MusicAlbum
  date published: 2024-06-27