Sharon Isbin is a multiple GRAMMY Award-winning American classical guitarist and the founder and director of the guitar department at the Juilliard School.Maurice J. Summerfield: The Classical Guitar.
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 0xda9eba874aa5753afce5e3b7fe0e498707b8c3f55a3a1e67276fef8c8132fb9b. 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/bf3bf7d6-07f6-4523-b2c8-387664d24a98.json and https://artists.proofprofile.net/proofs/artist/bf3bf7d6-07f6-4523-b2c8-387664d24a98.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Latin Romances for Guitar [standard] (standard)
Rodrigo: Concierto de Aranjuez: I. Allegro con spirito
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 0x8a4e3c4989a8cc816b37136138e7f2333a985781e2c622bc382fcfd23b977319. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBAYC8900271.
Vivaldi / Arr. Pujol: Guitar Concerto in D Major, RV 93: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad8c90a4290e4752a4372d8de54ddf42cb1c56df5b23702ea1b36f5af604dd4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAYC8904366.
Love Songs & Lullabies for Guitar and Voice
Vivaldi, Bach, JS & Albinoni : Guitar Concertos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca49879f06ccdf3b80078ed13477b6871527a72ebce0cf08bdbd84776d29919a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBAYC8801663.
Rodrigo, Villa-Lobos & Ponce : Guitar Concertos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4fc02c7e96231c1fa390ad6884d5f92794fa218dcd96a607811814a659a4da. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:36:19Z), 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/USQX90900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543e4ec66022953c63dba07dd97178a242e57d3af5692820f29927bb9d00b7fa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USSM11103125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6b47990d0799eb6f5d632381dda3f41e9fcf90acbfc9701b4de40e3ef36aa5. 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/USSM11103126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d16eff6604c97115e5fe96869199c038be56f8fca27d592fc21482f2a2601b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USSM11103129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733dde6d5583219ed9c12cb7e904737292f24539ec7e077f194f438c0d28d0b6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USSM11103131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00b672cc741c061f91c642d61d516e0d64f778ad775a4f54978b45684a89e1d. 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/USSM11103134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4e149368290e7fc73984805813d4b782bd4e974807e787418b082adf301f20. 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/USSM11103137.
Granados: Cuentos de la juventud, Op. 1: No. 1, Dedicatoria (Transcr. Isbin for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e20201d4cd614b10f47216a348fb1628784b983f834228d08ab6422bf3255db. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DEA809935300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad8c90a4290e4752a4372d8de54ddf42cb1c56df5b23702ea1b36f5af604dd4. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBAYC8904366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad8c90a4290e4752a4372d8de54ddf42cb1c56df5b23702ea1b36f5af604dd4. 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/GBAYC8904366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad8c90a4290e4752a4372d8de54ddf42cb1c56df5b23702ea1b36f5af604dd4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBAYC8904366.
Villa-Lobos: Floresta do Amazonas, W551: Melodia Sentimental (Arr. Barbosa-Lima for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5466ac493845665120174ac679f3b5b7e89abfd956faf2d5b5f340b8cef799. 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/GBAYC8801674.