Claire Ma 馬愷伶
type: MusicGroup
popularity: 3
followers: 59
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc060323e8aafc52d1461c6c13d8f70bb22280bd919c06ce6399368bf5a532cb8
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/dcf5d5b5-f6d8-4e6f-97b6-67a4408234da.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/dcf5d5b5-f6d8-4e6f-97b6-67a4408234da.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/dcf5d5b5-f6d8-4e6f-97b6-67a4408234da
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc060323e8aafc52d1461c6c13d8f70bb22280bd919c06ce6399368bf5a532cb8","name":"Claire Ma 馬愷伶","registered_at":"2026-06-21T05:33:49Z","symbol":"NIM1835295","token_address":"0xb6ce78d8ded1237d80917b259e7fa2967e0e0ada","type":"artist","uuid":"dcf5d5b5-f6d8-4e6f-97b6-67a4408234da"}
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 0xc060323e8aafc52d1461c6c13d8f70bb22280bd919c06ce6399368bf5a532cb8. 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/dcf5d5b5-f6d8-4e6f-97b6-67a4408234da.json and https://artists.proofprofile.net/proofs/artist/dcf5d5b5-f6d8-4e6f-97b6-67a4408234da.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":"0xc060323e8aafc52d1461c6c13d8f70bb22280bd919c06ce6399368bf5a532cb8","name":"Claire Ma 馬愷伶","registered_at":"2026-06-21T05:33:49Z","symbol":"NIM1835295","token_address":"0xb6ce78d8ded1237d80917b259e7fa2967e0e0ada","type":"artist","uuid":"dcf5d5b5-f6d8-4e6f-97b6-67a4408234da"}
album: 臺大的垃圾（臺大畢業歌）
  type: MusicAlbum
  date published: 2024-03-21
  track: 臺大的垃圾（臺大畢業歌）
    type: MusicRecording
    duration: PT3M2S
    duration ms: 182726
    explicit: false
    by artist: Claire Ma 馬愷伶
    in album: 臺大的垃圾（臺大畢業歌）
      type: MusicAlbum
      date published: 2024-03-21
    isrc code: CAHQJ2495498
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T00:28:43+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xbeb4e0d67236f95872d713c12adc0a2c40026950642445b7c3c48cef7cb4be10
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956725
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956725
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAHQJ2495498
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T01:12:41Z
    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 0xbeb4e0d67236f95872d713c12adc0a2c40026950642445b7c3c48cef7cb4be10. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAHQJ2495498 — a six-check JSON result.
      date published: 2026-07-05T01:12:41Z
    audio: 臺大的垃圾（臺大畢業歌）
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 159.97
      additional property: Musical Key
        type: PropertyValue
        value: 3
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.627
      additional property: Energy
        type: PropertyValue
        value: 0.435
      additional property: Speechiness
        type: PropertyValue
        value: 0.049
      additional property: Acousticness
        type: PropertyValue
        value: 0.391
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.167
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.486
      additional property: Loudness (dB)
        type: PropertyValue
        value: -10.038
      additional property: Key Name
        type: PropertyValue
        value: Eb
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: bella bella
  type: MusicAlbum
  date published: 2025-10-31