Daco Junior
type: MusicGroup
description: Sebastian Da Costa (born 1990 in Luanda, Angola), better known by his stage name Daco Junior, is a singer/songwriter, rapper and a record producer from Vaasa, Finland. Daco Junior debuted in December
popularity: 2
followers: 386
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc3244dc85bb4ae4a1f7d8a3d7fbd163b09e96d2a0ae6a3aa1bb144146db55755
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954784
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954784
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f1c37162-44bd-4a37-9b79-4552c942e22b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f1c37162-44bd-4a37-9b79-4552c942e22b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f1c37162-44bd-4a37-9b79-4552c942e22b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-22T02:53:59Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc3244dc85bb4ae4a1f7d8a3d7fbd163b09e96d2a0ae6a3aa1bb144146db55755","name":"Daco Junior","registered_at":"2026-06-21T13:36:06Z","symbol":"NIM1933368","token_address":"0xe7440a8e7d89777dcfcea8fa799b5c9985c723ed","type":"artist","uuid":"f1c37162-44bd-4a37-9b79-4552c942e22b"}
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 0xc3244dc85bb4ae4a1f7d8a3d7fbd163b09e96d2a0ae6a3aa1bb144146db55755. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1c37162-44bd-4a37-9b79-4552c942e22b.json and https://artists.proofprofile.net/proofs/artist/f1c37162-44bd-4a37-9b79-4552c942e22b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-22T02:53:59Z
  text: {"copyright_id":"0xc3244dc85bb4ae4a1f7d8a3d7fbd163b09e96d2a0ae6a3aa1bb144146db55755","name":"Daco Junior","registered_at":"2026-06-21T13:36:06Z","symbol":"NIM1933368","token_address":"0xe7440a8e7d89777dcfcea8fa799b5c9985c723ed","type":"artist","uuid":"f1c37162-44bd-4a37-9b79-4552c942e22b"}
album: Sane
  type: MusicAlbum
  date published: 2010-12-13
album: Gravity
  type: MusicAlbum
  date published: 2011-07-21
album: Heartbeat Solo
  type: MusicAlbum
  date published: 2012-01-01
album: How Far
  type: MusicAlbum
  date published: 2012-01-01
album: Perfect Runaway
  type: MusicAlbum
  date published: 2012-01-01
album: Like An Astronaut
  type: MusicAlbum
  date published: 2012-01-01