Tau Cross
type: MusicGroup
description: thumb|A tau cross (Saint Anthony's cross) The tau cross is a T-shaped cross, sometimes with all three ends of the cross expanded.Merriam-Webster: tau cross It is called a "tau cross" because it is sh
popularity: 9
followers: 5221
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xabad99bd303d0c6e21b691281a309f309090626e859ab5483c7d0af2b191aa20
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954549
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954549
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/aa1f2c2c-c730-4309-8e5c-b93e4cc95fa7.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/aa1f2c2c-c730-4309-8e5c-b93e4cc95fa7.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/aa1f2c2c-c730-4309-8e5c-b93e4cc95fa7
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T10:56:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xabad99bd303d0c6e21b691281a309f309090626e859ab5483c7d0af2b191aa20","name":"Tau Cross","registered_at":"2026-06-20T09:12:09Z","symbol":"NIM1576463","token_address":"0xdbb085649cb72fce3f49925da0f67ef8dd74da63","type":"artist","uuid":"aa1f2c2c-c730-4309-8e5c-b93e4cc95fa7"}
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 0xabad99bd303d0c6e21b691281a309f309090626e859ab5483c7d0af2b191aa20. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa1f2c2c-c730-4309-8e5c-b93e4cc95fa7.json and https://artists.proofprofile.net/proofs/artist/aa1f2c2c-c730-4309-8e5c-b93e4cc95fa7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T10:56:20Z
  text: {"copyright_id":"0xabad99bd303d0c6e21b691281a309f309090626e859ab5483c7d0af2b191aa20","name":"Tau Cross","registered_at":"2026-06-20T09:12:09Z","symbol":"NIM1576463","token_address":"0xdbb085649cb72fce3f49925da0f67ef8dd74da63","type":"artist","uuid":"aa1f2c2c-c730-4309-8e5c-b93e4cc95fa7"}
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  date published: 2022-04-01