Ellis Larkins (May 15, 1923 – September 29, 2002) was an American jazz pianist born in Baltimore, Maryland, known for his two recordings with Ella Fitzgerald: the albums Ella Sings Gershwin (1950) and
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 0x2e5a16f5cf449c17475f34fb5d0bf0798dd6d62616aa08c183d21725dbf9f00f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/577d444b-bb16-4eb2-a5f9-7f37f8de32ac.json and https://artists.proofprofile.net/proofs/artist/577d444b-bb16-4eb2-a5f9-7f37f8de32ac.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Smooth One (1977) [The Definitive Black & Blue Sessions]
Blue and Sentimental Medley: Am I Blue / Interlude # / Blue Prelude / Loose Ends / Blue and Sentimental / Ode to Marie / Blue Moon / Interlude / Time / Blue Again / Four Bar Intro with Tag / A Blues Serenade
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 0x5a85c34e5aa6e1a51beb08a61c0158c40c5b8ab67552d2c860cc55eeae541156. 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/USMC15486093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d4c45d7b6061a2068cddb65e230cfe12654adec8ed646a8cad407b246eca14. 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/USMC15486088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d5e57e625a3cb8597c13c49dfb61ddf4ef9f5523fc9a4fe5a034e24cd86e3c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USMC15486089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38afda3fa0c0162f8e757b4ed601966f07c7bc8865bc28d470d2fd3b937592fc. 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/USMC15486094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc547140a3aa4c91deff0bce8b550875144a0d1544789de180f4c9880a6cc8aad. 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/USMC15486096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c39153fea5d3c05a3247d2cfe89a1128ec03805c394612433bc19c9294eb99. 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/USMC15486087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c39153fea5d3c05a3247d2cfe89a1128ec03805c394612433bc19c9294eb99. 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/USMC15486087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d4c45d7b6061a2068cddb65e230cfe12654adec8ed646a8cad407b246eca14. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USMC15486088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d5e57e625a3cb8597c13c49dfb61ddf4ef9f5523fc9a4fe5a034e24cd86e3c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USMC15486089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa429e17d9b2f3a5f15a850d3a28a0bb109d9a30c0a498301aa8c95f01a82db66. 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/USMC15486090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048d4351c70fca351a37692d5daba12bed771cf54b7fac925be24d943688efec. 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/USMC15486091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ac69c8e0d4ab1fa014dffec4b467a3b6f85afc3a22bd4389c3c626ff100980. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USMC15486092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a85c34e5aa6e1a51beb08a61c0158c40c5b8ab67552d2c860cc55eeae541156. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USMC15486093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38afda3fa0c0162f8e757b4ed601966f07c7bc8865bc28d470d2fd3b937592fc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USMC15486094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aabe3ecabf9badb6bfdf2d641ae1a28ac446579f489fdbd13c7faa0cc5c187b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USMC15486095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc547140a3aa4c91deff0bce8b550875144a0d1544789de180f4c9880a6cc8aad. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USMC15486096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ef8f4bba3b39cbcf07809fc8c1600c8f6de54600d92de8dc76e636f9b2d012. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USMC15486097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bd80307029492ebd2003772e02edf77a69270157b3c1b09d20df0245727bcc. 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/USMC15486098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048d4351c70fca351a37692d5daba12bed771cf54b7fac925be24d943688efec. 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/USMC15486091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc547140a3aa4c91deff0bce8b550875144a0d1544789de180f4c9880a6cc8aad. 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/USMC15486096.