Karl Haas (December 6, 1913February 6, 2005) was a German-American classical music radio host, known for his sonorous speaking voice, humanistic approach to music appreciation, and popularization of c
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 0x260475d46e90343a9e2297336a49d8df1639b276160a50c6a47bb3a10338d0af. 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/6c8e478b-6b9a-4e5f-a8f3-db7b19dd8acc.json and https://artists.proofprofile.net/proofs/artist/6c8e478b-6b9a-4e5f-a8f3-db7b19dd8acc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).