Four Friends
type: MusicGroup
popularity: 7
followers: 86
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa85effdbff245d10e633d2c0f8d9098e3833d381aa6564d975e4dbbf5c3da805
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/6627734e-ca34-4309-95a1-3df7ecdc2484.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6627734e-ca34-4309-95a1-3df7ecdc2484.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/6627734e-ca34-4309-95a1-3df7ecdc2484
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa85effdbff245d10e633d2c0f8d9098e3833d381aa6564d975e4dbbf5c3da805","name":"Four Friends","registered_at":"2026-06-17T01:10:26Z","symbol":"NIM1233856","token_address":"0x67ba45eb590671ab3c605826f2a7291701a4aea3","type":"artist","uuid":"6627734e-ca34-4309-95a1-3df7ecdc2484"}
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 0xa85effdbff245d10e633d2c0f8d9098e3833d381aa6564d975e4dbbf5c3da805. 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/6627734e-ca34-4309-95a1-3df7ecdc2484.json and https://artists.proofprofile.net/proofs/artist/6627734e-ca34-4309-95a1-3df7ecdc2484.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xa85effdbff245d10e633d2c0f8d9098e3833d381aa6564d975e4dbbf5c3da805","name":"Four Friends","registered_at":"2026-06-17T01:10:26Z","symbol":"NIM1233856","token_address":"0x67ba45eb590671ab3c605826f2a7291701a4aea3","type":"artist","uuid":"6627734e-ca34-4309-95a1-3df7ecdc2484"}
album: Já to Causando
  type: MusicAlbum
  date published: 2024-10-25
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  type: MusicAlbum
  date published: 2025-03-03
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  type: MusicAlbum
  date published: 2025-03-24
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  type: MusicAlbum
  date published: 2025-04-17