The International Symphony Orchestra of Sarnia, Ontario and Port Huron, Michigan began in 1957. The Little Orchestra Society of Sarnia and the Port Huron String Ensemble came together and formed the
{"copyright_id":"0xbecee47dff15fbb7aeee8da5fd74d96d93d3bd4ebb4be8e0c0465e159099addf","name":"International Symphony Orchestra","registered_at":"2026-06-16T20:37:52Z","symbol":"NIM1168844","token_address":"0xb020402fc6647496627b99fcf3fe76e0d40fb1d2","type":"artist","uuid":"58ab3d6f-6424-4d6e-aa73-2be2fee8cadc"}
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 0xbecee47dff15fbb7aeee8da5fd74d96d93d3bd4ebb4be8e0c0465e159099addf. 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/58ab3d6f-6424-4d6e-aa73-2be2fee8cadc.json and https://artists.proofprofile.net/proofs/artist/58ab3d6f-6424-4d6e-aa73-2be2fee8cadc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Great George Gershwin: American in Paris / Rhaposdy in Blue