Roland Hayes
type: MusicGroup
description: Roland Wiltse Hayes (June 3, 1887 – January 1, 1977) was an American lyric tenor and composer. Critics lauded his abilities and linguistic skills demonstrated with songs in French, German, and Italian
popularity: 3
followers: 735
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x81b6f9b6b6150d81e5620ad43e4e81e14ebecb9fb668f2c0a2ef3900f52d499c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954065
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954065
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5052323a-ec8c-48c5-9f4e-c4822c2ce83b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5052323a-ec8c-48c5-9f4e-c4822c2ce83b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/5052323a-ec8c-48c5-9f4e-c4822c2ce83b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x81b6f9b6b6150d81e5620ad43e4e81e14ebecb9fb668f2c0a2ef3900f52d499c","name":"Roland Hayes","registered_at":"2026-06-16T17:42:28Z","symbol":"NIM1126990","token_address":"0xafe01c8d87fb69a61569ae6b4a934996f5042226","type":"artist","uuid":"5052323a-ec8c-48c5-9f4e-c4822c2ce83b"}
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 0x81b6f9b6b6150d81e5620ad43e4e81e14ebecb9fb668f2c0a2ef3900f52d499c. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5052323a-ec8c-48c5-9f4e-c4822c2ce83b.json and https://artists.proofprofile.net/proofs/artist/5052323a-ec8c-48c5-9f4e-c4822c2ce83b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x81b6f9b6b6150d81e5620ad43e4e81e14ebecb9fb668f2c0a2ef3900f52d499c","name":"Roland Hayes","registered_at":"2026-06-16T17:42:28Z","symbol":"NIM1126990","token_address":"0xafe01c8d87fb69a61569ae6b4a934996f5042226","type":"artist","uuid":"5052323a-ec8c-48c5-9f4e-c4822c2ce83b"}
album: The Art of Roland Hayes
  type: MusicAlbum
  date published: 2009-08-10