コタマ(CV:高川みな)
type: MusicGroup
popularity: 12
followers: 55
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xefe07a0c04db2b70ce853cc8b458080f6a88a8e8303e1fb1e5076a8f1b58156c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953641
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953641
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3b48298b-6eb3-4bf2-8019-42460a12a448.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3b48298b-6eb3-4bf2-8019-42460a12a448.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3b48298b-6eb3-4bf2-8019-42460a12a448
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T13:54:28Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xefe07a0c04db2b70ce853cc8b458080f6a88a8e8303e1fb1e5076a8f1b58156c","name":"コタマ(CV:高川みな)","registered_at":"2026-06-14T10:46:22Z","symbol":"NIM0428666","token_address":"0x24cc2d6a6438acba52504c85b3a94f936eadf0c4","type":"artist","uuid":"3b48298b-6eb3-4bf2-8019-42460a12a448"}
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 0xefe07a0c04db2b70ce853cc8b458080f6a88a8e8303e1fb1e5076a8f1b58156c. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b48298b-6eb3-4bf2-8019-42460a12a448.json and https://artists.proofprofile.net/proofs/artist/3b48298b-6eb3-4bf2-8019-42460a12a448.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T13:54:28Z
  text: {"copyright_id":"0xefe07a0c04db2b70ce853cc8b458080f6a88a8e8303e1fb1e5076a8f1b58156c","name":"コタマ(CV:高川みな)","registered_at":"2026-06-14T10:46:22Z","symbol":"NIM0428666","token_address":"0x24cc2d6a6438acba52504c85b3a94f936eadf0c4","type":"artist","uuid":"3b48298b-6eb3-4bf2-8019-42460a12a448"}