Sum Gravis
type: MusicGroup
popularity: 2
followers: 46
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x237afe30699eeb3d0bd550a88e2f7c48355a679004024751c31b5bb9e19e6cd3
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954742
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954742
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fd7d6c5f-03e8-4019-bca7-52b970a65daa.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fd7d6c5f-03e8-4019-bca7-52b970a65daa.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/fd7d6c5f-03e8-4019-bca7-52b970a65daa
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T20:46:40Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x237afe30699eeb3d0bd550a88e2f7c48355a679004024751c31b5bb9e19e6cd3","name":"Sum Gravis","registered_at":"2026-06-21T17:40:47Z","symbol":"NIM1990019","token_address":"0x135408ed2188605d200b039f18192fe5882fcc75","type":"artist","uuid":"fd7d6c5f-03e8-4019-bca7-52b970a65daa"}
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 0x237afe30699eeb3d0bd550a88e2f7c48355a679004024751c31b5bb9e19e6cd3. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd7d6c5f-03e8-4019-bca7-52b970a65daa.json and https://artists.proofprofile.net/proofs/artist/fd7d6c5f-03e8-4019-bca7-52b970a65daa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T20:46:40Z
  text: {"copyright_id":"0x237afe30699eeb3d0bd550a88e2f7c48355a679004024751c31b5bb9e19e6cd3","name":"Sum Gravis","registered_at":"2026-06-21T17:40:47Z","symbol":"NIM1990019","token_address":"0x135408ed2188605d200b039f18192fe5882fcc75","type":"artist","uuid":"fd7d6c5f-03e8-4019-bca7-52b970a65daa"}
album: Pixel de Amor
  type: MusicAlbum
  date published: 2025-02-26
  track: Pixel de Amor
    type: MusicRecording
    duration: PT2M52S
    duration ms: 172235
    explicit: false
    by artist: Sum Gravis
    in album: Pixel de Amor
      type: MusicAlbum
      date published: 2025-02-26
    isrc code: GX3Q92504587
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-06T02:07:53+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x1355d0c6c06a47ce15d1b2cd3e3cbd68d187af006b2c072492857710244eb53e
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956891
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956891
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX3Q92504587
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T09:10:22Z
    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 0x1355d0c6c06a47ce15d1b2cd3e3cbd68d187af006b2c072492857710244eb53e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T09:10:22Z), 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/GX3Q92504587.
      date published: 2026-07-21T09:10:22Z
    audio: Pixel de Amor
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 169.957
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.462
      additional property: Energy
        type: PropertyValue
        value: 0.601
      additional property: Speechiness
        type: PropertyValue
        value: 0.031
      additional property: Acousticness
        type: PropertyValue
        value: 0.012
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.004
      additional property: Liveness
        type: PropertyValue
        value: 0.105
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.835
      additional property: Loudness (dB)
        type: PropertyValue
        value: -10.863
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Tarde o Temprano
  type: MusicAlbum
  date published: 2025-08-15