Al Melgard (October 4, 1890 in Denmark – June 18, 1977) was an organist for the Chicago Stadium, from 1930 until he retired in 1974. Career Melgard, who lost his left index finger in an accident as a
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 0x26a32f407f9d04fad36b9ef339eef699421b86b9aed9f12fcbb704a361f4ae4f. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d876e2c3-b86d-4290-a9ec-603bfb12c077.json and https://artists.proofprofile.net/proofs/artist/d876e2c3-b86d-4290-a9ec-603bfb12c077.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Military Marches. Al Melgard at the Chicago Stadium Organ Vol. 4
Al Melgard at the Chicago Stadium Pipe Organ