Sigma Eleven
type: MusicGroup
popularity: 5
followers: 139
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xccf56ba02d1dd8f64a8be8d30832a9d9d63243fc3680198a1b3d28d1521ba040
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953984
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953984
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2d145b5d-c2da-4f2b-a11b-52d915775ce2.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2d145b5d-c2da-4f2b-a11b-52d915775ce2.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2d145b5d-c2da-4f2b-a11b-52d915775ce2
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T18:08:34Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xccf56ba02d1dd8f64a8be8d30832a9d9d63243fc3680198a1b3d28d1521ba040","name":"Sigma Eleven","registered_at":"2026-06-16T05:21:12Z","symbol":"NIM0950088","token_address":"0x678b614e7f919c504d106fbf7235b0bd7f733fb6","type":"artist","uuid":"2d145b5d-c2da-4f2b-a11b-52d915775ce2"}
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 0xccf56ba02d1dd8f64a8be8d30832a9d9d63243fc3680198a1b3d28d1521ba040. Chain 2 (Bitcoin): anchored in block 953984 (2026-06-16T18:08:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d145b5d-c2da-4f2b-a11b-52d915775ce2.json and https://artists.proofprofile.net/proofs/artist/2d145b5d-c2da-4f2b-a11b-52d915775ce2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T18:08:34Z
  text: {"copyright_id":"0xccf56ba02d1dd8f64a8be8d30832a9d9d63243fc3680198a1b3d28d1521ba040","name":"Sigma Eleven","registered_at":"2026-06-16T05:21:12Z","symbol":"NIM0950088","token_address":"0x678b614e7f919c504d106fbf7235b0bd7f733fb6","type":"artist","uuid":"2d145b5d-c2da-4f2b-a11b-52d915775ce2"}
album: Hope
  type: MusicAlbum
  date published: 2020-09-19
album: Que Bonita Vecindad
  type: MusicAlbum
  date published: 2020-09-19
  track: Que Bonita Vecindad
    type: MusicRecording
    duration: PT3M15S
    duration ms: 195710
    explicit: false
    by artist: Sigma Eleven
    in album: Que Bonita Vecindad
      type: MusicAlbum
      date published: 2020-09-19
    isrc code: USL4Q2070921
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-03T11:51:45+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x4bb624f651ac101a75d7383420e21a9a15fd5b36d638dd4fd9a2f336a2679104
    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/USL4Q2070921
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb624f651ac101a75d7383420e21a9a15fd5b36d638dd4fd9a2f336a2679104. 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/USL4Q2070921.
      date published: 2026-07-03T19:59:51Z
    audio: Que Bonita Vecindad
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 114.999
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.502
      additional property: Energy
        type: PropertyValue
        value: 0.472
      additional property: Speechiness
        type: PropertyValue
        value: 0.035
      additional property: Acousticness
        type: PropertyValue
        value: 0.005
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.152
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.158
      additional property: Loudness (dB)
        type: PropertyValue
        value: -12.734
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Mi Sombra En La Pared
  type: MusicAlbum
  date published: 2021-09-15
album: Dreams of Sorrow
  type: MusicAlbum
  date published: 2022-02-12
album: I Love Heavy Metal
  type: MusicAlbum
  date published: 2022-03-01
album: Hope
  type: MusicAlbum
  date published: 2022-04-25