Sendai Era
type: MusicGroup
popularity: 5
followers: 1096
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1d6c8ac4fff9e2ac8ddd11fb2b869c8d24530cad9b9de7bb9cb60d75e55a9196
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953864
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953864
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/04a53aef-4000-4940-b3eb-25ada73f9f07.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/04a53aef-4000-4940-b3eb-25ada73f9f07.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/04a53aef-4000-4940-b3eb-25ada73f9f07
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T00:30:31Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x1d6c8ac4fff9e2ac8ddd11fb2b869c8d24530cad9b9de7bb9cb60d75e55a9196","name":"Sendai Era","registered_at":"2026-06-15T15:09:05Z","symbol":"NIM0746691","token_address":"0xcda7e4acbd27245ae8dfa6c745c1dfe489b122ff","type":"artist","uuid":"04a53aef-4000-4940-b3eb-25ada73f9f07"}
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 0x1d6c8ac4fff9e2ac8ddd11fb2b869c8d24530cad9b9de7bb9cb60d75e55a9196. Chain 2 (Bitcoin): anchored in block 953864 (2026-06-16T00:30:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04a53aef-4000-4940-b3eb-25ada73f9f07.json and https://artists.proofprofile.net/proofs/artist/04a53aef-4000-4940-b3eb-25ada73f9f07.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T00:30:31Z
  text: {"copyright_id":"0x1d6c8ac4fff9e2ac8ddd11fb2b869c8d24530cad9b9de7bb9cb60d75e55a9196","name":"Sendai Era","registered_at":"2026-06-15T15:09:05Z","symbol":"NIM0746691","token_address":"0xcda7e4acbd27245ae8dfa6c745c1dfe489b122ff","type":"artist","uuid":"04a53aef-4000-4940-b3eb-25ada73f9f07"}
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