Lee Henry Hoiby (February 17, 1926 – March 28, 2011) was an American composer and classical pianist. Best known as a composer of operas and songs, he was a disciple of composer Gian Carlo Menotti. Lik
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93a8ef4736b27cb87c2ebfccc1c3069c6590a4e69cc99dc9d8b67e7858aadd5. Chain 2 (Bitcoin): anchored in block 953976 (2026-06-16T16:55:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b59c646-c819-4224-ab49-6a4037ce634c.json and https://artists.proofprofile.net/proofs/artist/2b59c646-c819-4224-ab49-6a4037ce634c.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.