William Kraft (September 6, 1923 – February 12, 2022) was an American composer, conductor, teacher, timpanist, and percussionist. Biography Early life and education (1923–1954) Kraft was born in Chic
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 0x52b9553e5d3ee5c1e998a9c3c99985123b75dd38dbd5ad1fa7d602c4dac4ed0e. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4fbad9a7-24e9-4082-ba04-27c7843f5263.json and https://artists.proofprofile.net/proofs/artist/4fbad9a7-24e9-4082-ba04-27c7843f5263.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kraft, W.: Concerto for 4 Percussion Soloists / Contextures I / Games: Collage No. 1 / Double Trio
An Encounter with the Music of William Kraft
Fire and Ice (Original Motion Picture Soundtrack)
Avalanche (original Motion Picture Soundtrack)