The Chicago Philharmonic is an American orchestra based in Chicago, Illinois, governed by the Chicago Philharmonic Society. Founded in 1988 by principals of the Lyric Opera Orchestra of Chicago, it is
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 0x7eafb4b34b938d861011a242af5fda92c6ed887901d5f520291c41fc74a6b8b4. Chain 2 (Bitcoin): anchored in block 954556 (2026-06-20T12:14:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af8db43a-0cd5-4ab7-919c-113aec2f44a7.json and https://artists.proofprofile.net/proofs/artist/af8db43a-0cd5-4ab7-919c-113aec2f44a7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).