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: 7
followers: 3
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4f29559a1bba902cc2a18f24a5b5c204d02ecf319b0f60d47b5abd932c197f99
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954035
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954035
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3cbfae59-af54-4064-8325-351be4482cae.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3cbfae59-af54-4064-8325-351be4482cae.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3cbfae59-af54-4064-8325-351be4482cae
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T02:39:28Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4f29559a1bba902cc2a18f24a5b5c204d02ecf319b0f60d47b5abd932c197f99","name":"Echo Chamber","registered_at":"2026-06-16T10:46:32Z","symbol":"NIM1027761","token_address":"0xe3d4680742e11abd11eadbe5cc9743eeead53298","type":"artist","uuid":"3cbfae59-af54-4064-8325-351be4482cae"}
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 0x4f29559a1bba902cc2a18f24a5b5c204d02ecf319b0f60d47b5abd932c197f99. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3cbfae59-af54-4064-8325-351be4482cae.json and https://artists.proofprofile.net/proofs/artist/3cbfae59-af54-4064-8325-351be4482cae.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:10:43Z
  text: {"copyright_id":"0x4f29559a1bba902cc2a18f24a5b5c204d02ecf319b0f60d47b5abd932c197f99","name":"Echo Chamber","registered_at":"2026-06-16T10:46:32Z","symbol":"NIM1027761","token_address":"0xe3d4680742e11abd11eadbe5cc9743eeead53298","type":"artist","uuid":"3cbfae59-af54-4064-8325-351be4482cae"}
album: Darling Where Are You
  type: MusicAlbum
  date published: 2025-02-15