The Maple Leaf Ragtime Band
type: MusicGroup
popularity: 5
followers: 110
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x66e0e5d37f6c637f2e20db686f70fdd1c4b17e476d4b08c1bd9cb975a36a03cc
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954650
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954650
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/da14a638-ef21-4e5d-86f2-d8e88698b461.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/da14a638-ef21-4e5d-86f2-d8e88698b461.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/da14a638-ef21-4e5d-86f2-d8e88698b461
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T04:51:12Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x66e0e5d37f6c637f2e20db686f70fdd1c4b17e476d4b08c1bd9cb975a36a03cc","name":"The Maple Leaf Ragtime Band","registered_at":"2026-06-21T04:06:08Z","symbol":"NIM1813776","token_address":"0x28ce49b07a56475de86fce2a2f68af66def24723","type":"artist","uuid":"da14a638-ef21-4e5d-86f2-d8e88698b461"}
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 0x66e0e5d37f6c637f2e20db686f70fdd1c4b17e476d4b08c1bd9cb975a36a03cc. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da14a638-ef21-4e5d-86f2-d8e88698b461.json and https://artists.proofprofile.net/proofs/artist/da14a638-ef21-4e5d-86f2-d8e88698b461.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T04:51:12Z
  text: {"copyright_id":"0x66e0e5d37f6c637f2e20db686f70fdd1c4b17e476d4b08c1bd9cb975a36a03cc","name":"The Maple Leaf Ragtime Band","registered_at":"2026-06-21T04:06:08Z","symbol":"NIM1813776","token_address":"0x28ce49b07a56475de86fce2a2f68af66def24723","type":"artist","uuid":"da14a638-ef21-4e5d-86f2-d8e88698b461"}
album: Essential Ragtime Classics
  type: MusicAlbum
  date published: 2009-03-31
album: Ragtime to Perfection
  type: MusicAlbum
  date published: 2009-03-31
album: Special Ragtime Collection
  type: MusicAlbum
  date published: 2009-03-31
  track: Sugarcane Rag
    type: MusicRecording
    duration: PT3M1S
    duration ms: 181446
    explicit: false
    by artist: The Maple Leaf Ragtime Band
    in album: Special Ragtime Collection
      type: MusicAlbum
      date published: 2009-03-31
    isrc code: USJ7U0883402
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-15T16:05:29+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xf11a7737115bb827aed70c7ff3e1804c56a4b4aa5fa90eb653550c4f659675ce
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958176
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958176
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ7U0883402
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-15T19:07:17Z
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11a7737115bb827aed70c7ff3e1804c56a4b4aa5fa90eb653550c4f659675ce. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:07:17Z), 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/USJ7U0883402.
      date published: 2026-07-15T19:07:17Z
    audio: Sugarcane Rag
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 95.69
      additional property: Musical Key
        type: PropertyValue
        value: 10
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.513
      additional property: Energy
        type: PropertyValue
        value: 0.293
      additional property: Speechiness
        type: PropertyValue
        value: 0.037
      additional property: Acousticness
        type: PropertyValue
        value: 0.984
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.951
      additional property: Liveness
        type: PropertyValue
        value: 0.11
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.873
      additional property: Loudness (dB)
        type: PropertyValue
        value: -18.554
      additional property: Key Name
        type: PropertyValue
        value: Bb
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Ragtime Deluxe
  type: MusicAlbum
  date published: 2009-03-31
album: Classic Ragtime
  type: MusicAlbum
  date published: 2009-03-31
album: Supreme Ragtime
  type: MusicAlbum
  date published: 2009-03-31