Sergi Martínez
type: MusicGroup
genre: lullaby
description: Sergi Martínez Costa (born 10 May 1999), is a Spanish professional basketball player for Bàsquet Girona of the Spanish Liga ACB. He has also represented the Spanish national team. Standing at 6 ft 8 i
popularity: 2
followers: 6
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1b4c171d64093c2e9aa3d2cf73eb175536d977f9c92afd93b38c1d298c83abb6
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953985
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953985
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2d357e15-829e-40b2-bcab-af4317ba4c4a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2d357e15-829e-40b2-bcab-af4317ba4c4a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2d357e15-829e-40b2-bcab-af4317ba4c4a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T18:03:53Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x1b4c171d64093c2e9aa3d2cf73eb175536d977f9c92afd93b38c1d298c83abb6","name":"Sergi Martínez","registered_at":"2026-06-16T05:36:06Z","symbol":"NIM0953658","token_address":"0x2c40707a79d38a22a30ee863c98972fca05dbdf8","type":"artist","uuid":"2d357e15-829e-40b2-bcab-af4317ba4c4a"}
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 0x1b4c171d64093c2e9aa3d2cf73eb175536d977f9c92afd93b38c1d298c83abb6. Chain 2 (Bitcoin): anchored in block 953985 (2026-06-16T18:03:53Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d357e15-829e-40b2-bcab-af4317ba4c4a.json and https://artists.proofprofile.net/proofs/artist/2d357e15-829e-40b2-bcab-af4317ba4c4a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T18:03:53Z
  text: {"copyright_id":"0x1b4c171d64093c2e9aa3d2cf73eb175536d977f9c92afd93b38c1d298c83abb6","name":"Sergi Martínez","registered_at":"2026-06-16T05:36:06Z","symbol":"NIM0953658","token_address":"0x2c40707a79d38a22a30ee863c98972fca05dbdf8","type":"artist","uuid":"2d357e15-829e-40b2-bcab-af4317ba4c4a"}