Franklin Cohen (born July 28, 1946) is an American clarinetist, best known for his tenure of 39 seasons as Principal Clarinet of the Cleveland Orchestra. He currently holds the title of Principal Clar
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 0x5483056fdea98907083ea3613fd9444dd2fc48a31e5078e3790ec6141649ca02. Chain 2 (Bitcoin): anchored in block 954141 (2026-06-17T21:14:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80169764-b24c-4979-a25d-a1b06cc4761c.json and https://artists.proofprofile.net/proofs/artist/80169764-b24c-4979-a25d-a1b06cc4761c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Brahms: Clarinet Sonatas Nos.1 & 2/Schumann: Fantasiestücke
Golijov: The Dreams and Prayers of Isaac The Blind
Première rhapsodie, L. 116: Première rhapsodie, CD 124b
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20535d073f2498e4d4c186eb04fc687e284a0ea07f0210389991b90147d78a4a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059105020.