Efren Medina Jr.
type: MusicGroup
popularity: 4
followers: 253
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0f7bf36241844062d346f31e57ce9b9b6ef6ba02725624b1ef9eb6a03e1f52e1
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954065
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954065
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/54e00c1c-8d6c-46af-a8c2-81847253e708.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/54e00c1c-8d6c-46af-a8c2-81847253e708.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/54e00c1c-8d6c-46af-a8c2-81847253e708
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x0f7bf36241844062d346f31e57ce9b9b6ef6ba02725624b1ef9eb6a03e1f52e1","name":"Efren Medina Jr.","registered_at":"2026-06-16T19:08:07Z","symbol":"NIM1147428","token_address":"0xd364b840a3a3a12cb9c5d08bd2bbff469e5dc99d","type":"artist","uuid":"54e00c1c-8d6c-46af-a8c2-81847253e708"}
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 0x0f7bf36241844062d346f31e57ce9b9b6ef6ba02725624b1ef9eb6a03e1f52e1. 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/54e00c1c-8d6c-46af-a8c2-81847253e708.json and https://artists.proofprofile.net/proofs/artist/54e00c1c-8d6c-46af-a8c2-81847253e708.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:10:43Z
  text: {"copyright_id":"0x0f7bf36241844062d346f31e57ce9b9b6ef6ba02725624b1ef9eb6a03e1f52e1","name":"Efren Medina Jr.","registered_at":"2026-06-16T19:08:07Z","symbol":"NIM1147428","token_address":"0xd364b840a3a3a12cb9c5d08bd2bbff469e5dc99d","type":"artist","uuid":"54e00c1c-8d6c-46af-a8c2-81847253e708"}
album: Ayoko nang Mangarap pa
  type: MusicAlbum
  date published: 2023-07-08
album: U-Turn
  type: MusicAlbum
  date published: 2023-07-15
album: Batid kong ikaw na nga
  type: MusicAlbum
  date published: 2023-07-22
album: Hanggang dito na lamang ba
  type: MusicAlbum
  date published: 2023-09-09
album: BISIG NG PAGMAMAHAL
  type: MusicAlbum
  date published: 2023-12-15
album: Angkas na
  type: MusicAlbum
  date published: 2024-01-06
album: Musikero, Musikera
  type: MusicAlbum
  date published: 2024-01-26
album: Kahit Saan, Basta't Kasama Ka
  type: MusicAlbum
  date published: 2024-04-19
album: Please come back home (reload)
  type: MusicAlbum
  date published: 2024-05-18
album: Please come back home
  type: MusicAlbum
  date published: 2024-05-18
album: Ang ganda ganda mo
  type: MusicAlbum
  date published: 2024-06-07
album: Ang ganda ganda mo (Korean Ballad Version)
  type: MusicAlbum
  date published: 2024-06-07
album: Do you remember
  type: MusicAlbum
  date published: 2024-06-28
album: Ang aking kublihan
  type: MusicAlbum
  date published: 2024-09-27
album: U-Turn (2025 Version)
  type: MusicAlbum
  date published: 2025-02-21
album: Sige na nga
  type: MusicAlbum
  date published: 2025-02-21
album: Efren Medina Jr.: The Sentimental Balladeer -, Vol. 1
  type: MusicAlbum
  date published: 2025-05-30