Echo37
type: MusicGroup
popularity: 9
followers: 370
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xcaf6778054a2d27fe81b9a94a2b33af72bf041fe9456ed3b61847186ca67cbd1
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954516
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954516
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a23fab61-6aef-429e-91dd-db75a2abd65d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a23fab61-6aef-429e-91dd-db75a2abd65d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a23fab61-6aef-429e-91dd-db75a2abd65d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T07:04:44Z
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 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 0xcaf6778054a2d27fe81b9a94a2b33af72bf041fe9456ed3b61847186ca67cbd1. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a23fab61-6aef-429e-91dd-db75a2abd65d.json and https://artists.proofprofile.net/proofs/artist/a23fab61-6aef-429e-91dd-db75a2abd65d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T07:04:44Z
album: Zwiędłe kwiaty
  type: MusicAlbum
  date published: 2021-12-05
album: Murek37
  type: MusicAlbum
  date published: 2021-12-30
album: 2022
  type: MusicAlbum
  date published: 2022-02-22
album: Wavy
  type: MusicAlbum
  date published: 2022-08-08
album: Chcę tylko ciebie
  type: MusicAlbum
  date published: 2022-09-13
album: 41-253
  type: MusicAlbum
  date published: 2022-12-21
album: Hełm NASA
  type: MusicAlbum
  date published: 2022-12-30
album: Filary
  type: MusicAlbum
  date published: 2023-01-31
album: Lonely
  type: MusicAlbum
  date published: 2023-06-17
  track: Lonely
    type: MusicRecording
    duration: PT2M26S
    duration ms: 146086
    explicit: true
    by artist: Echo37
    in album: Lonely
      type: MusicAlbum
      date published: 2023-06-17
    isrc code: QZMEN2368343
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T09:22:06+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xb6926e1a32040d310b07afc4ec97f282d99c2cba66d7cf70c6e26d3831b5ada5
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956634
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956634
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEN2368343
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-04T10:04:33Z
    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 0xb6926e1a32040d310b07afc4ec97f282d99c2cba66d7cf70c6e26d3831b5ada5. 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/QZMEN2368343.
      date published: 2026-07-04T10:04:33Z
    audio: Lonely
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 92.003
      additional property: Musical Key
        type: PropertyValue
        value: 6
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.793
      additional property: Energy
        type: PropertyValue
        value: 0.407
      additional property: Speechiness
        type: PropertyValue
        value: 0.176
      additional property: Acousticness
        type: PropertyValue
        value: 0.436
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.207
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.174
      additional property: Loudness (dB)
        type: PropertyValue
        value: -9.542
      additional property: Key Name
        type: PropertyValue
        value: F#
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Braveheart
  type: MusicAlbum
  date published: 2023-12-12
  track: Braveheart
    type: MusicRecording
    duration: PT2M22S
    duration ms: 142141
    explicit: true
    by artist: Echo37
    in album: Braveheart
      type: MusicAlbum
      date published: 2023-12-12
    isrc code: PLA812380052
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T12:59:50+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xb548680f59dc9f98673f00125397221d31d25e459d6730d44fb5d5fb8b16b3d2
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 959008
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959008
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLA812380052
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T13:14:05Z
    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 0xb548680f59dc9f98673f00125397221d31d25e459d6730d44fb5d5fb8b16b3d2. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/PLA812380052.
      date published: 2026-07-21T13:14:05Z
    audio: Braveheart
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 94.814
      additional property: Musical Key
        type: PropertyValue
        value: 11
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      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
album: FOMO
album: Cyberia
album: Auto bez dachu
album: Mary Jane
album: Da shaaa
album: WOLNY
album: Anioły
album: Red Beam
album: Wąglik
album: PayPal
album: Czas

Danceability
type: PropertyValue
value: 0.761

Energy
type: PropertyValue
value: 0.581

Speechiness
type: PropertyValue
value: 0.301

Acousticness
type: PropertyValue
value: 0.608

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.105

Valence (Positivity)
type: PropertyValue
value: 0.288

Loudness (dB)
type: PropertyValue
value: -7.013

Key Name
type: PropertyValue
value: B

Mode Name
type: PropertyValue
value: Major

FOMO
type: MusicAlbum
date published: 2024-01-31

Cyberia
type: MusicAlbum
date published: 2024-02-29

Auto bez dachu
type: MusicAlbum
date published: 2024-04-16

Mary Jane
type: MusicAlbum
date published: 2024-04-20

Da shaaa
type: MusicAlbum
date published: 2024-06-03

WOLNY
type: MusicAlbum
date published: 2024-10-09

Anioły
type: MusicAlbum
date published: 2024-11-28

Red Beam
type: MusicAlbum
date published: 2025-01-16

Wąglik
type: MusicAlbum
date published: 2025-04-16

PayPal
type: MusicAlbum
date published: 2025-06-04

Czas
type: MusicAlbum
date published: 2025-09-05