Kirk Whalum (born July 11, 1958) is an American R&B and smooth jazz saxophonist and songwriter. He has recorded a series of commercially successful and critically acclaimed solo studio albums, as well
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 0x84d5a7a7e6494787eb3cda4b5ef89a9eb2418185276b37396c4ed667fff3ad4f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4bf0d82-778c-479a-a8e1-9f69e96c9cfe.json and https://artists.proofprofile.net/proofs/artist/c4bf0d82-778c-479a-a8e1-9f69e96c9cfe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Everything Is Everything: The Music of Donny Hathaway
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 0x20fbd6c640b20a52b7ca4626e2625cda452d388ca36a60999436d15c41b479e9. 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/US3471004501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c3f05bb9352223ed58b78ab3b6d4cb7e466778a5259564290b72cce26b06c5. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/US3471004502.
We're Still Friends (feat. Musiq Soulchild)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3caa4d50611616572d9d3947243461c484d903f038f98772a45133b5d8cae784. 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/US3471004503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be77a792d2f8ce180e9bc91a6005a70fa2188bf1c693d6442e17e37844765c4. 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/US3471004504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa26f61345b0d7f6ed36e45bbd0b8ddb9ee5552787e77b0f8313965afb64adef. 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/US3471004505.
Valdez in the Country (feat. Jeff Golub)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c864492852966b6067cb09256aaf7b317c6d2241bd229ef4912836d8a56a1b1. 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/US3471004506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6c3466f45a53b7c5145eb75c3914c340ebfe68e52fe42d9eb9bb9aa07d60b7. 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/US3471004508.
Voices Inside (Everything Is Everything)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edac466b2debc3b7ad24a22034b843db6e4ae9daea42b457f2dae81130dae3c. 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/US3471004511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a7bac35ee6382ed89a010a98736d0b26506ea72ef6eb2fa0ecedc016709814. 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/US3471004507.
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 0xd7ec91db6b5ba031af847cd98ebd61e1dfc1d7a84adfd2bd915ef72cce75217c. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/US3471004509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f06d953dfac9580966d62626a521e7277640af9bf395e4fb2b071a4259b0d2. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/US3471004510.
Coming Right at Ya (feat. Jeff Lorber, Kirk Whalum, Paul Jackson Jr. & Lenny Castro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56850580a01764843abf09dc3710787bd625d056d344e0429af655ef426494af. 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/US4W40610192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd168dc9cefd25f3118edc5d8a639b4040b87b28b0e92e5028fbfd7a497bed1ab. 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/USGR10400628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8eb50cb86a3840daf9e5a62f740eca8895dab3e956f0925e267b54250ae46ee. 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/USWR30200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595e9c8477d155f93d3c5e0721ffbcf0c42105ada9fdbe38e4004de133d7de84. 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/USJ2P0800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6c3466f45a53b7c5145eb75c3914c340ebfe68e52fe42d9eb9bb9aa07d60b7. 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/US3471004508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdd4f69cb3e6b7e397b43aa55c280c2b037ecc869832abc815b2d2702bfad1c. 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/US3470750271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d48430c9c545b7f608f6d43e2e4c863f7ec1acee3a87fa74aa26700fe6b432. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USA370625695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5632bf7492fca6ea471fab351723c389f6775536276a9d57f82a2d354f66c67. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/US4W40610197.