A is an ensemble of wind instruments (usually about five to eight players) employed by an aristocratic patron, particularly during the Classical era of the 18th century. The Harmonie would be employe
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 0xab701076f98bf2948cf0e4e9b94b423205c0d7bb8582475046ae9356bed32a09. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e41d54fc-15d9-4c1e-b362-150e06e108ab.json and https://artists.proofprofile.net/proofs/artist/e41d54fc-15d9-4c1e-b362-150e06e108ab.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).