Cal Harris Jr. is an American contemporary jazz artist, producer, audio engineer, songwriter, and composer. In 2018 Cal Harris was ranked the #5 smooth jazz artist by Billboard. He has toured with Pri
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 0xc1fc4e7f960e78790e313bc89890ef113418b9810b76b4f189ce6b6fc59dd06c. 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/7a6685a3-ed20-4138-8074-a98ff353fb8b.json and https://artists.proofprofile.net/proofs/artist/7a6685a3-ed20-4138-8074-a98ff353fb8b.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409ec75f346c09677d3efa391e185fc6607f3547481ee20410ab8280108228a2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAAR1035229.
Sheter Island (Remix) [feat. Euge Groove]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d80477fd34d5ecb9a184a089415208c66754b3d7c4b40276034be8a14ae8d1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCABT1459752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fe738fa1bd310c20e7c741093fa8bd96b24d6a65ca544696a2f70925930c36. 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/TCABN1381992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c50259978f9aa479be419b3943fcf381234e7a454ef92a40de467b388f932d4. 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/TCABN1382004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87604ef90ed19428101a248b1906a51d9f7268ac43af0a45fa649495c1eb327. 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/TCABN1382000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b89ae1583048b4e1568042caf136ca5f3229ffc5fc785fe46ed786c3da02835. 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/TCABN1381987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e9dec58b0912cc5597b8d6b06802969c73e91aa95caee872631a98e8fbdf01. 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/TCABN1381990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4864ba925e83060a1ce114b0f988d7e7dfe504856a7c3e11e2b282557fd44b. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCABN1381986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d11dd2cfdf7e7ae8f5ff8a1efd5959fbfbafe8ad9a58645f4d9993c81b122f. 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/TCACB1415420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ef2d53c733ae9304c4cd17e2ea30c15c801193434607dcfb1e6f821a061f57. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/TCACB1415364.
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 0xa03e8ede8d92b9375244fb420667c2f2c88d8ffad8d95fc3f7c79f7eea3fd2a0. 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/TCABN1381999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6575105f577cc06433e740b7888cec1a329e62dd3fd6b1753c8042e49854ed. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TCABN1382005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8b387f62c4fe84605f8116bac7008fed22a8d293faca15a0c883ea2ade07a1. 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/TCABN1381989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12e91775f4db5b02cdee63b427982e1bd14f119ad1b2202a6a25d57d6b07663. 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/TCABN1381995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35013874cf1817cf7c37d10a4538e96c571932236df777ed2f00d542a42b9b32. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USCGH1919201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b260ea8bcf506e5c76cffd052bf42a730f7d2648511c564d0d3c77ac5bd913c. Chain 2 (Bitcoin): anchored in block 957551 (2026-07-11T10:03:47Z), 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/QZ5FN2194647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6779d347da5b51cc2d8b2b6fae6096c49b7f99ad704429f58195c60e435ab236. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/GBWUL2132876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9328238000b3d1d790565fd7ea88fb7cd1944e379cbad03daedb7fdf7e3ac3e1. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZTRX2262888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89576990c44f04eed0c6d94e640834ebf84b66f2b57b687668d668fe9899d78b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZ5FN2415451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbd83fb6e90e8484b6d92600a6d082e87269f83e84a8ea39750b4a9c15b886d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTRX2338106.