Joe Rock (born Joseph Simberg, December 25, 1893 – December 5, 1984) was an American film producer, director, actor,Obituary Variety, December 12, 1984, page 63. and screenwriter. He produced a series
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 0x5c017c04c74e8b5cf06e7bc8340f560b4ca0997971e81ee88f6bcdd90ddf6e16. 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/b96a7887-d506-4d7b-b6c9-9668b7ad2cfa.json and https://artists.proofprofile.net/proofs/artist/b96a7887-d506-4d7b-b6c9-9668b7ad2cfa.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 0x79426257f83bf01950efb55ad8ca26f778170be6b6d4495412006243cf1b59d0. 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/QMBZ92358096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340e8cdb00114ce9e8190fdc8fa299259ca61410ef4085afd098ad824f751f6d. 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/NOX8G2400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc9019951c0f18f8ad2bbfddf68d875664f1503bf9946d208601499f3b439d2. 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/USA2P2361086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e52bdac87fc15cefce9e8c6e826eee6a35e10a490892c276f6fe5a4b19730d2. 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/QZTBF2352509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ad6160f0cd238d5444c17c3cef07b945a4f77553a86813dbe9659f526c0ba9. 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/QZTBF2352510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1b221da64112ad790bba351ee8a3e45ce19af7d4b5ec9852521857c264eca3. 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/USA2P2421076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9608b51cad201f69dd5679ab19a6c010c624698a3f9357dfc352db56fd2371. 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/USA2P2421075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4459f7f68ef5b3542c712d5bb98b7a7493ddc19fe21c792ac4e3f600ebc36a. 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/USA2P2421077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f0b82a8e2f39145063361afd69aaa34af9c4503d92db4f3a7264daef682077. 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/USA2P2421078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48043a495884b284a99606c36f8b7b5172d93967c04055d11c1f1cfc6e83ca60. 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/USA2P2421079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a68dbd3919b0bb4df07a88e2b86958724dafd158d8695d410cd17e843593ae. 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/NOX8G2300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4485d192ab46ebeadb91e07a1b4ff211ed01fc8c1a57178810387503e2099359. 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/NOX8G2300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3cbee0f50e4ec78de40bac32d51cf330b5ccb3085045ece3952862f0996227. 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/NOX8G2300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf233c98dcf93df081f2f441585341cd722960983aeff1ade44f5482693a7bfc1. 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/NOX8G2300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6506beaac56fcb889f2800f8f9c59615d031e223f2bc2df5d3ffe78bef8161d8. 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/NOX8G2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958c330e04040c42c4813799e75968a9d51dd8731a4d81255acb7d0c561a16ec. 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/NOX8G2300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a889bedaad3c81c7c63bd372fa44cbf0275a3829fd6e8b94d581b7567652b93. 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/NOX8G2300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9233efd0f6a15d4ba6f5ef5c9d6e1b139b93c0acfb865b788b20697ac06add14. 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/QZTAZ2393229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10759885c169f4a20991bb8afe995d56edd31ee2c3779b9a7abd9519f135c50. 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/QZTAZ2393230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf188aae49733ceb2afd312c7bd2e75c9eee5dfe6614cf4bff45f563ad6df4879. 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/QZTAZ2393231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33506e9045ef595b92309d0e8e5c52afabec7e9ce7fc39c2d88d9a88acece83. 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/QZTAZ2393232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f4307861211e20f855aedef0e8617a674fd6024956a8cd8c365ce49d7b3f5b. 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/QZTAZ2393233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd119f55194c5ca21c34c79740ddca22570c76dffeffdc95f3a3ae71768ade852. 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/QZTAZ2393234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6261286d0240f4aa351fd40be4e44920c4358f9568121825217a7f554d0367f. 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/NOX8G2400068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b101c57a99876b30a103aadd001a01c1821c7a8eb4de7518729f1a86c597a2a. 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/NOX8G2400069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d166ef7c74444a290e79297556c8088a4e8bee92cb4621a0e80570b941c1524. 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/NOX8G2400070.