University of Michigan Chamber Choir
type: MusicGroup
genre: choral
popularity: 2
followers: 38
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7b8aa2f3522db5d0974722de9ff2489f33c5f050ee5ea994ecc98dc08521bf53
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/e07701eb-979c-443c-8fdc-683fd6b41fbb.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e07701eb-979c-443c-8fdc-683fd6b41fbb.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e07701eb-979c-443c-8fdc-683fd6b41fbb
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x7b8aa2f3522db5d0974722de9ff2489f33c5f050ee5ea994ecc98dc08521bf53","name":"University of Michigan Chamber Choir","registered_at":"2026-06-21T06:27:16Z","symbol":"NIM1848202","token_address":"0x1e763ac40626332105ccea5341ecafbab8e10d97","type":"artist","uuid":"e07701eb-979c-443c-8fdc-683fd6b41fbb"}
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 0x7b8aa2f3522db5d0974722de9ff2489f33c5f050ee5ea994ecc98dc08521bf53. 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/e07701eb-979c-443c-8fdc-683fd6b41fbb.json and https://artists.proofprofile.net/proofs/artist/e07701eb-979c-443c-8fdc-683fd6b41fbb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0x7b8aa2f3522db5d0974722de9ff2489f33c5f050ee5ea994ecc98dc08521bf53","name":"University of Michigan Chamber Choir","registered_at":"2026-06-21T06:27:16Z","symbol":"NIM1848202","token_address":"0x1e763ac40626332105ccea5341ecafbab8e10d97","type":"artist","uuid":"e07701eb-979c-443c-8fdc-683fd6b41fbb"}
album: Americana: Choral Works by Randall Thompson, Elliott Carter, and Seymour Shifrin
  type: MusicAlbum
  date published: 1996-01-01
album: White Hurricane
  type: MusicAlbum
  date published: 2016-12-10
  track: I Can Tell the World (Arr. Moses Hogan)
    type: MusicRecording
    duration: PT2M43S
    duration ms: 163213
    explicit: false
    by artist: University of Michigan Chamber Choir
    in album: White Hurricane
      type: MusicAlbum
      date published: 2016-12-10
    genre: choral
    isrc code: QMZ621600718
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-31T04:13:59+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xcd57c53cf1c64a37c3684c3105bb9b78e823c5253064dd0282319dcb572c4a9f
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 960349
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/960349
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMZ621600718
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-31T05:23:41Z
    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 0xcd57c53cf1c64a37c3684c3105bb9b78e823c5253064dd0282319dcb572c4a9f. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMZ621600718.
      date published: 2026-07-31T05:23:41Z
    audio: I Can Tell the World (Arr. Moses Hogan)
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 102.043
      additional property: Musical Key
        type: PropertyValue
        value: 5
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 5
      additional property: Danceability
        type: PropertyValue
        value: 0.434
      additional property: Energy
        type: PropertyValue
        value: 0.299
      additional property: Speechiness
        type: PropertyValue
        value: 0.058
      additional property: Acousticness
        type: PropertyValue
        value: 0.982
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.156
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.228
      additional property: Loudness (dB)
        type: PropertyValue
        value: -21.323
      additional property: Key Name
        type: PropertyValue
        value: F
      additional property: Mode Name
        type: PropertyValue
        value: Major