Dan Welcher (born March 2, 1948)Joshua Kosman, "Welcher, Dan (Edward)", The New Grove Dictionary of Music and Musicians, second edition, edited by Stanley Sadie and John Tyrrell (London: Macmillan Pub
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2499978b4e47fac399f0189b87a3b605bf98b21bc495a2c0375605283cf8eed0. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb0b0463-d5dc-4b25-aeab-6c0903b3fa28.json and https://artists.proofprofile.net/proofs/artist/cb0b0463-d5dc-4b25-aeab-6c0903b3fa28.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Welcher: Haleakala / Prairie Light / Clarinet Concerto
White Mares of the Moon - Chamber Music Of Dan Welcher
Places in the West: Music of Dan Welcher