Sappy
type: MusicGroup
description: "Sappy" is a song by the American rock band Nirvana, written by vocalist and guitarist, Kurt Cobain. It was first released as a hidden track on the AIDS-benefit compilation album, No Alternative, in O
popularity: 12
followers: 1457
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additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlock
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additional property: OTSTimestamp
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  value: 2026-06-15T07:48:25Z
additional property: OTSCanonicalRecord
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 0x8dea3944cf2f87f1e1622451d1a00306d2bfe6c8290b745ce405a7865093343b. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4744af8-55b1-412b-869f-86d2c2af7579.json and https://artists.proofprofile.net/proofs/artist/b4744af8-55b1-412b-869f-86d2c2af7579.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T09:50:11Z
album: Baller (Lofi)
  type: MusicAlbum
  date published: 2022-11-03
  track: Baller (Lofi)
    type: MusicRecording
    duration: PT2M51S
    duration ms: 171180
    explicit: false
    by artist: Sappy
    in album: Baller (Lofi)
      type: MusicAlbum
      date published: 2022-11-03
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    additional property: OTSVerificationAPI
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    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-15T05:35:13Z
    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 0x3fbde9a38e35cea54e48f3a76c2991787deb4cf9bd439542a5fe35a91f0dc484. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZTAX2246139.
      date published: 2026-07-15T05:35:13Z
    audio: Baller (Lofi)
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 78.322
      additional property: Musical Key
        type: PropertyValue
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      additional property: Mode (Major/Minor)
        type: PropertyValue
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      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
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      additional property: Energy
        type: PropertyValue
        value: 0.47
      additional property: Speechiness
        type: PropertyValue
        value: 0.23
      additional property: Acousticness
        type: PropertyValue
        value: 0.004
      additional property: Instrumentalness
        type: PropertyValue
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      additional property: Liveness
        type: PropertyValue
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      additional property: Valence (Positivity)
        type: PropertyValue
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      additional property: Loudness (dB)
        type: PropertyValue
        value: -15.277
      additional property: Key Name
        type: PropertyValue
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      additional property: Mode Name
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album: Dil Nu (Lofi)
  type: MusicAlbum
  date published: 2022-11-03
  track: Dil Nu (Lofi)
    type: MusicRecording
    duration: PT4M29S
    duration ms: 269113
    explicit: false
    by artist: Sappy
    in album: Dil Nu (Lofi)
      type: MusicAlbum
      date published: 2022-11-03
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    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T05:03:25Z
    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 0xbaea5700a0e8367f7670deba9b82f80e6cc73be5ff79207fbc9d3522957e5140. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZTAX2247962.
      date published: 2026-07-17T05:03:25Z
    audio: Dil Nu (Lofi)
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 102.673
      additional property: Musical Key
        type: PropertyValue
        value: 11
      additional property: Mode (Major/Minor)
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      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
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      additional property: Energy
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      additional property: Speechiness
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      additional property: Acousticness
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      additional property: Instrumentalness
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      additional property: Liveness
        type: PropertyValue
        value: 0.096
      additional property: Valence (Positivity)
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      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
album: Waalian (Lofi)
album: People X Naino Wale Nai

Loudness (dB)
type: PropertyValue
value: -12.259

Key Name
type: PropertyValue
value: B

Mode Name
type: PropertyValue
value: Minor

Waalian (Lofi)
type: MusicAlbum
date published: 2022-11-08

People X Naino Wale Nai
type: MusicAlbum
date published: 2023-07-08