Quarteto A4
type: MusicGroup
genre: brazilian evangelical music
popularity: 4
followers: 437
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb8ad7cc377d463dfebc465a67dd4ed4e0d66fa9675daaee3d44c63c2395a3d5e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954058
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954058
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/44a552b6-63bb-4491-9f14-9fe4d9a58e3a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/44a552b6-63bb-4491-9f14-9fe4d9a58e3a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/44a552b6-63bb-4491-9f14-9fe4d9a58e3a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T06:34:31Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xb8ad7cc377d463dfebc465a67dd4ed4e0d66fa9675daaee3d44c63c2395a3d5e","name":"Quarteto A4","registered_at":"2026-06-16T13:28:26Z","symbol":"NIM1066368","token_address":"0x70430c4a8b440bdc7ec47e8ee43b3d0940220214","type":"artist","uuid":"44a552b6-63bb-4491-9f14-9fe4d9a58e3a"}
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 0xb8ad7cc377d463dfebc465a67dd4ed4e0d66fa9675daaee3d44c63c2395a3d5e. Chain 2 (Bitcoin): anchored in block 954058 (2026-06-17T06:34:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44a552b6-63bb-4491-9f14-9fe4d9a58e3a.json and https://artists.proofprofile.net/proofs/artist/44a552b6-63bb-4491-9f14-9fe4d9a58e3a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T06:34:31Z
  text: {"copyright_id":"0xb8ad7cc377d463dfebc465a67dd4ed4e0d66fa9675daaee3d44c63c2395a3d5e","name":"Quarteto A4","registered_at":"2026-06-16T13:28:26Z","symbol":"NIM1066368","token_address":"0x70430c4a8b440bdc7ec47e8ee43b3d0940220214","type":"artist","uuid":"44a552b6-63bb-4491-9f14-9fe4d9a58e3a"}
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