Spherical Harmonics
type: MusicGroup
description: right|thumb|300px|Visual representations of the first few real spherical harmonics. Blue portions represent regions where the function is positive, and yellow portions represent where it is negative.
popularity: 34
followers: 198
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additional property: OTSVerifyInstructions
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  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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2350ea03cb94d3fe249dc788cfd467a757aa2af026db2efdbe81a1f7fc8caf32. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/137c8bdc-f32a-4e7e-91b4-63fb1f5d88a8.json and https://artists.proofprofile.net/proofs/artist/137c8bdc-f32a-4e7e-91b4-63fb1f5d88a8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
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album: Echoes
  type: MusicAlbum
  date published: 2019-07-01
album: Lunar Eclipse
  type: MusicAlbum
  date published: 2019-10-04
album: Susurrus
  type: MusicAlbum
  date published: 2022-08-18
album: Opulence
  type: MusicAlbum
  date published: 2023-04-06
album: Mitis
  type: MusicAlbum
  date published: 2023-08-10
album: Luminary
  type: MusicAlbum
  date published: 2023-12-01
  track: Luminary
    type: MusicRecording
    duration: PT3M24S
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    explicit: false
    by artist: Spherical Harmonics
    in album: Luminary
      type: MusicAlbum
      date published: 2023-12-01
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    additional property: OTSTimestamp
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    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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
    subject of: OpenTimestamps Proof of Existence
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      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf119452647279d918b978861932316872be1eaa7fb8ca4c9540036d1b1334514. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE5IB2342343.
      date published: 2026-07-04T10:04:33Z
    audio: Luminary
      type: AudioObject
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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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        value: 0.965
      additional property: Liveness
        type: PropertyValue
        value: 0.11
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.039
      additional property: Loudness (dB)
        type: PropertyValue
        value: -38.805
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
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album: Novae
  type: MusicAlbum
  date published: 2024-04-26
album: Canticum Angelicum
  type: MusicAlbum
  date published: 2024-08-08
album: Sanguinity
  type: MusicAlbum
  date published: 2024-12-05
album: Yumanghan
  type: MusicAlbum
  date published: 2025-06-19
track: Susurrus
  type: MusicRecording
  duration: PT2M15S
  duration ms: 135755
  explicit: false
  by artist: Spherical Harmonics
  in album: Cognitive Calm
    type: MusicAlbum
    date published: 2024-08-21
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  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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005b865bc476d58ee7140995127f2d6831d44a644198052dcbc2a80cdee0a0a5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE5IB2280945.
    date published: 2026-07-08T03:20:19Z
  audio: Susurrus
    type: AudioObject
    additional property: Tempo (BPM)
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      value: 143.172
    additional property: Musical Key
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      value: 7
    additional property: Mode (Major/Minor)
    additional property: Time Signature
    additional property: Danceability
    additional property: Energy
    additional property: Speechiness
    additional property: Acousticness
    additional property: Instrumentalness
    additional property: Liveness
    additional property: Valence (Positivity)
    additional property: Loudness (dB)
    additional property: Key Name
    additional property: Mode Name

Mode (Major/Minor)
type: PropertyValue
value: 1

Time Signature
type: PropertyValue
value: 5

Danceability
type: PropertyValue
value: 0.2

Energy
type: PropertyValue
value: 0.068

Speechiness
type: PropertyValue
value: 0.057

Acousticness
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value: 0.905

Instrumentalness
type: PropertyValue
value: 0.923

Liveness
type: PropertyValue
value: 0.101

Valence (Positivity)
type: PropertyValue
value: 0.219

Loudness (dB)
type: PropertyValue
value: -31.091

Key Name
type: PropertyValue
value: G

Mode Name
type: PropertyValue
value: Major