250px|thumb|Grant Llewellyn in 2003 Grant Llewellyn (born 29 December 1960) is a Welsh conductor and music director of the Orchestre National de Bretagne. Biography Llewellyn was born in Tenby, Pem
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 0xb23e57d53fc2e92e8a5a630812a0580f30303cfa6bd06f558373677fc5ebb9bd. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0264ace6-e9a6-4716-b8da-09cc7dbbbafe.json and https://artists.proofprofile.net/proofs/artist/0264ace6-e9a6-4716-b8da-09cc7dbbbafe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rachmaninov, S.: Piano Concerto No. 4 (original 1926 version) / Medtner, N.: Piano Concerto No. 2
Piano Concerto No. 4 in G Minor, Op. 40: I. Allegro (Original 1926 Version)
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 0x8fdb7ed7660c513cf298344009022be445c92011a24a97331073f25626ac02fc. 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/SEAER0928040.
12 Songs, Op. 14: No. 11, Vesenniye vodi (Arr. Y. Sudbin for piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66005ff0b600c65fdceddd020399bd990901a4fafd70a313587970cd079a809b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SEAER0928070.
Piano Concerto No. 2 in C Minor, Op. 50: II. Romanza. Andante con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49211c984511ec9ccb46e4362c5cf17ff3bb5739c39f56893380ab6bfe1c7057. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SEAER0928020.
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
Walton: Cello Concerto - Strauss: Don Quixote, Op. 35, TrV 184 (Live)
Schumann, Brahms & Others: Works for Cello & Orchestra
Mathias: Piano Concertos Nos. 2 & 3 and Ceremony After a Fire Raid (Live)
Prokofiev: Sinfonia concertante in E Minor & Cello Sonata in C Major
Daugherty, M.: Sunset Strip / Williams, J.: Escapades / Rorem, N.: Lions / Rouse, C.: Friandises
Catch Me If You Can, Escapades: I. Closing In
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e577c291bf33c5fb13a09c45b625cedea246fef2e4e91c37434e34ca27c7fb1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEAEQ0844040.
Catch Me If You Can, Escapades: III. Joy Ride
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6167fcd90a295c1af3f5704644786e9e0605aa54f3ac1e20de4e6745b917ab00. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/SEAEQ0844060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133ca790fb1c46067bac6f284bcb1891a27fbc826470e8c44a8214f824ce1856. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBELX0400682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffd23911fecbe0b9716d02cf519db780a0b467e189a9825acc9a41ae8798195. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBELX0400683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e04083dbe5632ac83f68a7d46a681be52db6ccaf29c6ae0da8fede236e1763. 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/GBELX0400685.
To Be Sung Of A Summer Night On The Water
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ad9d2e223647656859bead78ae544f3f90046651d172f13562ec05a4388c00. 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/GBELX0400689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf51bce82dcd874ee46e55e6e532ab3e30320ae401860dc891aafa8f7cf231df. 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/GBELX0400690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccaa89d8072056794614c7b6437ecc527d3ed300dd855d717ba6dcda3060f93. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBELX0400684.
Mathias: Symphony No. 3, Helios, Oboe Concerto & Requiescat
Butterworth: The Banks of Green Willow; A Shropshire Lad/ /McGunn: The Land of the Mountain and the Flood/Coleridge-Taylor: Symphonic Variations on an African Air &c.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc4a962bf40ef122b92a58b9031fcb8b70771ef2e01168137c970a75e5f6f43. 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/GBF079111330.
Symphonic Variations on an African Air, Op. 63
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de2876edab7bd9a560bdf8987c4f38bd84a25e689dfd595b05b2f2afae40967. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBF079111340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320828d0ce6f0958f537f5756e912ae74aca7fcc501d1e48bc4d9b2bab4c2121. 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/GBF079111351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63aec7c4e18e03eae2897c6ed04262b2aed0acaedddc67fcf5d8307a3c70339d. 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/GBF079111352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1697fdc75d8a4a61d79def03d97d42863dbdbcbefeb782f539d312e93a3b06. 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/GBF079111360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41eb51e3c200dc96736e37161bdb5865aacccd9480f7af87084b6dec1eb9764. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBF079111370.
The Land of the Mountain and the Flood, Op. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd498fb3d64cade622fba08b2701a6ffc1b5ce5bb2e2257fc6e66ffa6ad62107. 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/GBF079111380.
Mysterious Light: Compositions for Chinese and Western Ensemble
Jacob / Howarth / Bourgeois: Trombone Concertos