sepia tones
type: MusicGroup
popularity: 28
followers: 47
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x87915d1a95d2a9b2c4681ffb0a38cf5ed556a7aaa41a90e483f10e78bc597f8d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d065762a-897a-4ff1-9e91-8f21e4af0a3e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d065762a-897a-4ff1-9e91-8f21e4af0a3e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d065762a-897a-4ff1-9e91-8f21e4af0a3e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x87915d1a95d2a9b2c4681ffb0a38cf5ed556a7aaa41a90e483f10e78bc597f8d","name":"sepia tones","registered_at":"2026-06-12T10:23:54Z","symbol":"NIM0269025","token_address":"0xec5842bbc15933e5730faa0958778d6acc01606f","type":"artist","uuid":"d065762a-897a-4ff1-9e91-8f21e4af0a3e"}
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 0x87915d1a95d2a9b2c4681ffb0a38cf5ed556a7aaa41a90e483f10e78bc597f8d. 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/d065762a-897a-4ff1-9e91-8f21e4af0a3e.json and https://artists.proofprofile.net/proofs/artist/d065762a-897a-4ff1-9e91-8f21e4af0a3e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0x87915d1a95d2a9b2c4681ffb0a38cf5ed556a7aaa41a90e483f10e78bc597f8d","name":"sepia tones","registered_at":"2026-06-12T10:23:54Z","symbol":"NIM0269025","token_address":"0xec5842bbc15933e5730faa0958778d6acc01606f","type":"artist","uuid":"d065762a-897a-4ff1-9e91-8f21e4af0a3e"}
album: Lavender Fields
  type: MusicAlbum
  date published: 2020-12-10
album: Alpine Winters
  type: MusicAlbum
  date published: 2021-01-07
  track: Pine Forest
    type: MusicRecording
    duration: PT2M27S
    duration ms: 147675
    explicit: false
    by artist: sepia tones
    in album: Alpine Winters
      type: MusicAlbum
      date published: 2021-01-07
    isrc code: TCAFF2069397
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-06-07T04:59:00+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x191e7a8076c40e3cdb2e425a7b6f19c0833409bff5c9d22a06dfbfe3402e2022
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 953528
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/953528
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFF2069397
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-06-13T15:41:10Z
    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 0x191e7a8076c40e3cdb2e425a7b6f19c0833409bff5c9d22a06dfbfe3402e2022. 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/TCAFF2069397.
      date published: 2026-06-13T15:41:10Z
    audio: Pine Forest
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 164.437
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 5
      additional property: Danceability
        type: PropertyValue
        value: 0.578
      additional property: Energy
        type: PropertyValue
        value: 0.08
      additional property: Speechiness
        type: PropertyValue
        value: 0.072
      additional property: Acousticness
        type: PropertyValue
        value: 0.994
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.897
      additional property: Liveness
        type: PropertyValue
        value: 0.114
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.402
      additional property: Loudness (dB)
        type: PropertyValue
        value: -23.699
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Waterfall
  type: MusicAlbum
  date published: 2021-01-27
album: Doves
  type: MusicAlbum
  date published: 2021-05-14
  track: Doves
    type: MusicRecording
    duration: PT2M13S
    duration ms: 133823
    explicit: false
    by artist: sepia tones
    in album: Doves
      type: MusicAlbum
      date published: 2021-05-14
    isrc code: NL4YD2100099
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-16T02:15:15+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xecb23d88d4cc157d3e3b41fa7d6ce38b2aed3ee11a0f705494425936c12ee894
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958228
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958228
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL4YD2100099
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-16T05:09:47Z
    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 0xecb23d88d4cc157d3e3b41fa7d6ce38b2aed3ee11a0f705494425936c12ee894. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:09:47Z), 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/NL4YD2100099.
      date published: 2026-07-16T05:09:47Z
    audio: Doves
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 77.12
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.616
      additional property: Energy
        type: PropertyValue
        value: 0.218
      additional property: Speechiness
        type: PropertyValue
        value: 0.08
      additional property: Acousticness
        type: PropertyValue
        value: 0.995
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.938
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
album: Memories
album: mini exploratory tapes
album: Fishing Irrigation Systems for Massive Browns

Liveness
type: PropertyValue
value: 0.119

Valence (Positivity)
type: PropertyValue
value: 0.182

Loudness (dB)
type: PropertyValue
value: -21.535

Key Name
type: PropertyValue
value: E

Mode Name
type: PropertyValue
value: Major

Memories
type: MusicAlbum
date published: 2021-06-18

mini exploratory tapes
type: MusicAlbum
date published: 2022-02-03

Fishing Irrigation Systems for Massive Browns
type: MusicAlbum
date published: 2023-06-17