Echo Chamber
type: MusicGroup
description: thumb|right|Echo chamber of the Dresden University of Technology thumb|right|Hamilton Mausoleum has a long-lasting unplanned echo An echo chamber is a hollow enclosure used to produce reverberation,
popularity: 2
followers: 1
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0a37dfd88bf6bd727851b3a5cbe4c772aaa8537a635ea0ae245962e5191a6c56
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6c74d47a-59a8-4ae2-a7a2-5048b8a954c9.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6c74d47a-59a8-4ae2-a7a2-5048b8a954c9.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/6c74d47a-59a8-4ae2-a7a2-5048b8a954c9
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x0a37dfd88bf6bd727851b3a5cbe4c772aaa8537a635ea0ae245962e5191a6c56","name":"Echo Chamber","registered_at":"2026-06-17T03:26:17Z","symbol":"NIM1266276","token_address":"0x9d03a95be7db90d5c4d27b355be3fb6b171e869e","type":"artist","uuid":"6c74d47a-59a8-4ae2-a7a2-5048b8a954c9"}
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 0x0a37dfd88bf6bd727851b3a5cbe4c772aaa8537a635ea0ae245962e5191a6c56. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c74d47a-59a8-4ae2-a7a2-5048b8a954c9.json and https://artists.proofprofile.net/proofs/artist/6c74d47a-59a8-4ae2-a7a2-5048b8a954c9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x0a37dfd88bf6bd727851b3a5cbe4c772aaa8537a635ea0ae245962e5191a6c56","name":"Echo Chamber","registered_at":"2026-06-17T03:26:17Z","symbol":"NIM1266276","token_address":"0x9d03a95be7db90d5c4d27b355be3fb6b171e869e","type":"artist","uuid":"6c74d47a-59a8-4ae2-a7a2-5048b8a954c9"}
album: Speechless
  type: MusicAlbum
  date published: 2025-05-10
  track: Speechless
    type: MusicRecording
    duration: PT3M44S
    duration ms: 224329
    explicit: false
    by artist: Echo Chamber
    in album: Speechless
      type: MusicAlbum
      date published: 2025-05-10
    isrc code: AEA3A2536654
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T19:58:11+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x8a20ec7522a575f58bebfa15024089274202cdbcc6113543de502ef0bda74b3b
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    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956725
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956725
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AEA3A2536654
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T01:12:41Z
    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 0x8a20ec7522a575f58bebfa15024089274202cdbcc6113543de502ef0bda74b3b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AEA3A2536654.
      date published: 2026-07-05T01:12:41Z
    audio: Speechless
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 109.395
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.559
      additional property: Energy
        type: PropertyValue
        value: 0.428
      additional property: Speechiness
        type: PropertyValue
        value: 0.027
      additional property: Acousticness
        type: PropertyValue
        value: 0.001
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.313
      additional property: Liveness
        type: PropertyValue
        value: 0.207
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.237
      additional property: Loudness (dB)
        type: PropertyValue
        value: -14.656
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major