Sol Knopf
type: MusicGroup
genre: acoustic country
popularity: 3
followers: 310
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x10316da0e0e0fbf48dc7fd44d711a9c46e30666ee511bae93e995064d2a2fe2c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954346
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954346
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/93aff4d9-1b75-425b-89c4-79c3731cdf6b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/93aff4d9-1b75-425b-89c4-79c3731cdf6b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/93aff4d9-1b75-425b-89c4-79c3731cdf6b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:51:26Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x10316da0e0e0fbf48dc7fd44d711a9c46e30666ee511bae93e995064d2a2fe2c","name":"Sol Knopf","registered_at":"2026-06-17T17:12:33Z","symbol":"NIM1463313","token_address":"0xc3f4a37ec8e5f2d0f48205e9ba94c45919dc29e1","type":"artist","uuid":"93aff4d9-1b75-425b-89c4-79c3731cdf6b"}
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 0x10316da0e0e0fbf48dc7fd44d711a9c46e30666ee511bae93e995064d2a2fe2c. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93aff4d9-1b75-425b-89c4-79c3731cdf6b.json and https://artists.proofprofile.net/proofs/artist/93aff4d9-1b75-425b-89c4-79c3731cdf6b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:51:26Z
  text: {"copyright_id":"0x10316da0e0e0fbf48dc7fd44d711a9c46e30666ee511bae93e995064d2a2fe2c","name":"Sol Knopf","registered_at":"2026-06-17T17:12:33Z","symbol":"NIM1463313","token_address":"0xc3f4a37ec8e5f2d0f48205e9ba94c45919dc29e1","type":"artist","uuid":"93aff4d9-1b75-425b-89c4-79c3731cdf6b"}
album: Patience and Time
  type: MusicAlbum
  date published: 2007-06-02
album: Sea Change
  type: MusicAlbum
  date published: 2013-06-02
  track: My Baby Girl
    type: MusicRecording
    duration: PT3M41S
    duration ms: 221386
    explicit: false
    by artist: Sol Knopf
    in album: Sea Change
      type: MusicAlbum
      date published: 2013-06-02
    genre: acoustic country
    isrc code: USHM21340114
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-18T15:08:58+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x7288463f41ea9cd57afd972f13c0502b65fb2fb5b61303981692880472facefe
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958567
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958567
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21340114
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T15:22:40Z
    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 0x7288463f41ea9cd57afd972f13c0502b65fb2fb5b61303981692880472facefe. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USHM21340114.
      date published: 2026-07-18T15:22:40Z
    audio: My Baby Girl
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 152.094
      additional property: Musical Key
        type: PropertyValue
        value: 6
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.647
      additional property: Energy
        type: PropertyValue
        value: 0.325
      additional property: Speechiness
        type: PropertyValue
        value: 0.05
      additional property: Acousticness
        type: PropertyValue
        value: 0.799
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.22
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.431
      additional property: Loudness (dB)
        type: PropertyValue
        value: -10.68
      additional property: Key Name
        type: PropertyValue
        value: F#
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Rehoboth Beach
  type: MusicAlbum
  date published: 2016-01-01
album: Solitary Man
  type: MusicAlbum
  date published: 2020-11-20