Christopher Carson Cheek (born September 16, 1968) is an American jazz saxophonist. Biography Cheek was born in St. Louis, Missouri, where his father was the director of a Junior high school band. Ch
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 0x1858c1b7e1ffaf683f7b159829ce3ec9d42de8f01840cd8ad694b8a421c59959. 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/d5cf955a-32e8-4161-bb52-58b7d4cdd1d4.json and https://artists.proofprofile.net/proofs/artist/d5cf955a-32e8-4161-bb52-58b7d4cdd1d4.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 0xd12072396f33dc4fd5d35e640351bc3772a3838427c9926dc609cee7d1345fe2. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/PTRO12400152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f98cf6cfcb7643725f93ad93d35434b58be7dbe7a2d027dc85f017b7723ef8. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ES7712413101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc81e5640152380d5a1b97c418b31282f88b4743e56b3ff6f72fff962326b9e5. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/ES7712413102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33dce190fcae128259794a49a35918aa685f5efb876a12ffc54b6f6bcd7ee6b2. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ES7712413103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010fef81ba7aa03e009b3fbd5249e586e09c8ec4dd4a265bbdb0aad854fde017. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ES7712413104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffed2d4478b1bd36e102e6a57683f676076000874c6376f1fb5443299bc9fa6. 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/ES7712413107.
A Beautiful Selection of Songs from the Jerome Kern Songbook
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afa59615379b9d1056f0d0724527552decf039feb5d0b7e33324d77c79af4ed. 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/ES7712011002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37f71e4c5d70ac4ea59509eac76b45533396aa6b7df9c0d69681a942dfd6f7e. 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/ES7712011003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b47ea96b8fb11168992e0ffc90ba6b6e539d4912361ab4f0cc1d9054922ebd8. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ES7712011004.
Announcement (Remastered) [Expanded Edition]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705cc00bbe45f63a6ec5ac097fa47b435b1ffe12e7be566b042a5d98bfed61e9. 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/FR83J1701540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3951ec819c2e09e4b3a70a5de305208d716aafeee081a06e42f78460dabbf3cb. 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/NLGZ21600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d026646c7393b37ad29f4af6989d318521efd36365d2326be4b0ac45d96e864. 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/NLGZ21600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f3caaee7793b97f791bc028eb8b86dd9f13010f487575797ea537c355f1012. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/NLGZ21600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d88efe26a4054934a1f679a04f92dfb0788cbb5f2a702e2e2e102a60c5ba57. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/NLGZ21600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f17f7c6dc12098143e1fe3494b5134bca5cbfb77fed937bb96392224ea0b9cd. 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/NLGZ21600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ae7bd5dd25f8c047a37f1b33579cdb75c9062c18349093f1ec0dc3ae71dac6. 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/NLGZ21600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b1f6d477cffb12017798630ee26b5acd8592a5a1ca0e244a002ab561bf9a4f. 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/NLGZ21600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a881773067c7158943d448d68bdd5ecbd761ea86740ee26d366698a01e38f24. 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/NLGZ21600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d971935652c14354629e7c57e1c6dc21a0060dabf82371019ddd95a6e411f5. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ES7710523501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95992886afd95d821b16628c3a687f3deba71eee5cabf9402218633dac6caf7. 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/ES7710508601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5534660e6fe4154d276098ad190ec2c93c40742fea93b8783a5c33c794cb3270. 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/ES7710508602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2882e6952be4bde2c3b1c0de6519a34742ab84b3ccea944b079c322928c879fa. 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/ES7710508603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bea26ba81a41d4d47facc16dd6c3308be1b0030e7d620b250c910a6bf549558. 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/ES7710508604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249cb083841dbcb6f45cbdc0864ce83815d1facc9aa89c9bbc717aca86ea1404. 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/ES7710508605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b055bc4b3fa1964fda72104ba8195ef74a905f4fcccbf3de42b529dcfbdead. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ES7710508606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4706b9b193cc1bb574640a0877fd6ff1d67e84b3c8658c80f1bd12733d7845. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ES7710508607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad47896a0e64c42e407893724bab4bf5a18f8d542923e6eac1808cd6d890c3b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ES7710508608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c366cee375d6225d56a4410621af13428c5f5a086238152a8f0640b7b853a98. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/ES7710512501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e272701e97550341315a19568155317918d70648de6926108d9f6697727f7b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ES7710512502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d996a74cc2cbd2948c777b43e7348dd3489e133d4f571082a7788fc866402b. 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/ES7710512506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa274d95e466998a8cbdf267305c712ab2c81e00f6d36b9170c86259e12955a39. 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/ES7710502201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0575b81a9b340dd2a98cadc71a016de429e93c0e53f6577ecca82be3cdd73c1c. 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/ES7710502202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ef17b5b327aaf08a975738e304f1fb0d429f18cbe7a619f09999c20a4656e2. 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/ES7710502203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284fa6c1131cbd19092ed0e38fb4ea42217061d89e5002aac125f38e2b966bc9. 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/ES7710502204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cd84ae63afe8ab91dc78b163693897428fc9adfb48e63148cd16e280d298b6. 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/ES7710502205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172f35333ed5972ba9564c3da689b7af9cf2b49ee5aaa12d1a7598d661f6116f. 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/ES7710502206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6653e2ff45ecefefe6db85b1b31190f486ba5db4536578d1cee4953b774aebad. 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/ES7710502207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3954c7da21cb73f352f755b68291ce9f0b7f48de99911e80418b3ff5b0e6dda7. 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/ES7710502208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1661a0cfe36c8aef7688a0f5eb41baaeb5a940c43e1520b13ef2e550a914d9. 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/ES7710502209.