John Dearman is a Grammy Award-winning classical guitarist and one of the founding members of the Los Angeles Guitar Quartet (LAGQ). Known to LAGQ fans as the group's seven-string virtuoso who supplie
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 0x129847faead5b9d684d804fa59ea701a10c39544904a805e6c33a78c3edc5d77. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2613fa98-2fe2-449d-b020-a801d6787afd.json and https://artists.proofprofile.net/proofs/artist/2613fa98-2fe2-449d-b020-a801d6787afd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 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 0xb4bdab11ad986456296e2e824133b50c28043e554bd5aa92d36243cbc898c555. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/DEN960402121.
Oceana: 2. First Wave and Rain Train Interlude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412fa65e8c2bcfe04106f82e988f023455acc24f66cd1a7cd02bbc72722ba01d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEN960402122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5478b39f3ebc7c035534879088ca627805e6c8fb4a5e9f1ba5a15cc53228a2. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEN960402124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84e1e958708ad00c57e546a17922e81d779fb9ad781196388154bdc35bea3cd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEN960402123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293c4d9e78e6c8136076f59881b24943cab6b4f0099191705ed95f907c8c4e33. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/DEN960402125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d78fc44baee1c99ea1192186897309ec510735845c1cb73fb99531267306cbc. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEN960402126.
Solomon, HWV 67, Act III: Sinfonia, "Arrival of the Queen of Sheba" (arr. J. Dearman)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a138fca272da80d5e1d239da3a7135001e70660bfaec146930c529f4869324. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USASX0820507.
Concerto for 4 Violins in G Major, TWV 40:201 (arr. B. Kanengiser, S. Tennant, A. York and J. Dearman): I. Largo e staccato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb315374134201c3f016d33209e33bfd7e475d5de2015121071f9c5996eb324ce. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USASX0820515.