Casttro SA
type: MusicGroup
popularity: 2
followers: 76
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x854d2629b2bace4ce9b5d28b0d5ce33d4c451b6e977bac199477000dadca4a16
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953950
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953950
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/24ce60b1-88d5-4276-b419-f75c6a2f8db1.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/24ce60b1-88d5-4276-b419-f75c6a2f8db1.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/24ce60b1-88d5-4276-b419-f75c6a2f8db1
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T13:35:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x854d2629b2bace4ce9b5d28b0d5ce33d4c451b6e977bac199477000dadca4a16","name":"Casttro SA","registered_at":"2026-06-16T02:16:10Z","symbol":"NIM0905890","token_address":"0x7171bc6c1f7c95810b1a8f17803b42ecbaf58a15","type":"artist","uuid":"24ce60b1-88d5-4276-b419-f75c6a2f8db1"}
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 0x854d2629b2bace4ce9b5d28b0d5ce33d4c451b6e977bac199477000dadca4a16. Chain 2 (Bitcoin): anchored in block 953950 (2026-06-16T13:35:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/24ce60b1-88d5-4276-b419-f75c6a2f8db1.json and https://artists.proofprofile.net/proofs/artist/24ce60b1-88d5-4276-b419-f75c6a2f8db1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T13:35:39Z
  text: {"copyright_id":"0x854d2629b2bace4ce9b5d28b0d5ce33d4c451b6e977bac199477000dadca4a16","name":"Casttro SA","registered_at":"2026-06-16T02:16:10Z","symbol":"NIM0905890","token_address":"0x7171bc6c1f7c95810b1a8f17803b42ecbaf58a15","type":"artist","uuid":"24ce60b1-88d5-4276-b419-f75c6a2f8db1"}
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