Duo Vis
type: MusicGroup
popularity: 11
followers: 7
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x455a0263a05128d4e99288251677035ccc88c2fef50819803d1261c188a74cae
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953807
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953807
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f2e4dc7a-b68a-444e-94ce-890f50b3b937.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f2e4dc7a-b68a-444e-94ce-890f50b3b937.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f2e4dc7a-b68a-444e-94ce-890f50b3b937
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T16:39:18Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x455a0263a05128d4e99288251677035ccc88c2fef50819803d1261c188a74cae","name":"Duo Vis","registered_at":"2026-06-15T06:03:28Z","symbol":"NIM0704796","token_address":"0x4f67b211d300a6bb811e19b3609092d68eecce18","type":"artist","uuid":"f2e4dc7a-b68a-444e-94ce-890f50b3b937"}
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 0x455a0263a05128d4e99288251677035ccc88c2fef50819803d1261c188a74cae. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2e4dc7a-b68a-444e-94ce-890f50b3b937.json and https://artists.proofprofile.net/proofs/artist/f2e4dc7a-b68a-444e-94ce-890f50b3b937.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T16:45:15Z
  text: {"copyright_id":"0x455a0263a05128d4e99288251677035ccc88c2fef50819803d1261c188a74cae","name":"Duo Vis","registered_at":"2026-06-15T06:03:28Z","symbol":"NIM0704796","token_address":"0x4f67b211d300a6bb811e19b3609092d68eecce18","type":"artist","uuid":"f2e4dc7a-b68a-444e-94ce-890f50b3b937"}
track: Calypso melody

Calypso melody
type: MusicRecording
duration: PT2M58S
duration ms: 178795
explicit: false
by artist: Gloria Christian
by artist: Duo Vis
in album: A come amore
  type: MusicAlbum
  date published: 2019-05-23
genre: canzone-napoletana
isrc code: ITRKI1800715
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-08T05:51:37+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2f53a9a388a7516d054e6d7457362e243fbb1ec2e9da16eadb85756d0b2c0f5c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953520
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953520
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITRKI1800715
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-13T13:32:09+00:00
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
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 953520
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-06-13T13:32:09+00:00
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f53a9a388a7516d054e6d7457362e243fbb1ec2e9da16eadb85756d0b2c0f5c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITRKI1800715.
  date published: 2026-06-13T15:41:10Z
audio: Calypso melody
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 137.163
  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: 0.71
  additional property: Energy
    type: PropertyValue
    value: 0.319
  additional property: Speechiness
    type: PropertyValue
    value: 0.04
  additional property: Acousticness
    type: PropertyValue
    value: 0.907
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.332
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.779
  additional property: Loudness (dB)
    type: PropertyValue
    value: -14.856
  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Major