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 0x735ee6546f4d1fca7e3bedb28197e63b33e1142bd81bb3cfb10cf72de815b04b. 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/fc927674-d121-4481-b06f-7f09a7f2a947.json and https://artists.proofprofile.net/proofs/artist/fc927674-d121-4481-b06f-7f09a7f2a947.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 0x1cb63c8f72e0d16738318729599e8fb8348e92d5d6cba5afd97f8f6a98fea468. 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/QZN882225654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2fb0fc2648d8813fb6e051196467a123203a66623581ed65c0656bed94ab6e. 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/ES64E2302071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a526049aab599ed1fb4abe9c522b498c8e7d3489f1b3dd74af7dd5982251381. 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/ES65E2100110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbabcc23abdb4d8a5d2c50670a254edaa3a5961b802b03ab9dfa52d15360134. 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/QZN882224804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a093d66f2d6460969c406e29ecb3b723435204ddda9d205de96d1efe0acde4. 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/ES64E2502727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd8567da21f27c665b039964760a2b6707eb6ef981916c50fafcd4deefb8a6d. 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/ES64E2500519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc311266caa46fe51e852bed2340a0e5bb6fddee08bc764eece58a6b994ef0ba3. 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/ES64E2492305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dde53ceba9afd4bf14da505a0d5c7f18b1f3d9d050ae41029cda1227c82eccf. 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/ES64E2485267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553072dcc157d9923a79dc0640012517f4c294ff6fbddaaf40d80a5c109363b6. 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/ES64E2461445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebc966cb3b522254daaeb22ce78edb04232945e76a26e055fe85ebbc8b50e9d. 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/ES64E2311708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f281eb3dc6c2be3408c592b472f31c13a9099ea7e5c0e4b6ddf2a0dcd1a1c83. 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/ES64E2311704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1db3412f2622355b838c173d97a28413181eba0ff3b04f93503566d085b696e. 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/ES64E2303564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ddcb4826c31125b2e0416e0631754d6b8efb928a0c2e4811723ee71088d579. 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/ES64E2301992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a795320de21303e687dba536edcffd5d2ed243fef159575d6b739677beae3b. 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/ES64E2201998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435c74cbb1ab9487fc8087552c974d76b58e79b63c2f12815e30d4bd60039568. 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/ES64E2200641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351a59b0332759b56bc52a646f22c2186e6ff3b7ba982f316eafe9665978cfd0. 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/QM4TW2277640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c1ba68ad508258c0158625d8f5e22b976235eee0f373f61aa855fc5ae2c5d1. 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/QMDA72188941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57a203abc7aa434cb74d8e4687fd5530c7364fe3bf73fd3a6b2976e6add74b4. 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/QMDA72165655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0091ceb71c10b500e54f679674ffaf75aa368866152a59385f140350cfbd10c9. 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/QZN882159126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700054ebe0b33c01da7e79ae706164190c5b1168e1d89674ce23c0a0958122af. 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/QMFME2192355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907cd4ffbc552521ff71226e512e2cdd8cd9931c39b2e62f0ad03eca168a8d25. 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/QMBZ92177636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2d07db0a7daa0f40dbfb023933410a77ee0b42649a15afb62de0544260c0f8. 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/QM6MZ2167510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35160f6219c8f34c778e8534e62c75fc938a556f5839faa026c981f01348fd7f. 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/QM4TX2127437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711305f5583c1e963b01ae274c4df626b0a21e1c0d035a7ab67c311c466855da. 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/QM4TW2172021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfabf4bd30160f6c605965ee72b5d04cba2a8ee7e29b7532a01839a7991b26e. 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/QM4TW2134208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05246c0ea134c110d291669534da7f6e87ed447c123eb56e8423c797e0af341a. 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/ES71G2100931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6e0528dcd053e01f65c63d49df118556ffae78c867a3bcc7ed37d614cfb465. 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/QMFME2071610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48acdb4a0732bdce764870fcef8e2f79da0b3ebeac50d2ea46c90b1640a17fb. 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/QMFME2012040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8581d6c3d220ed93267042692124ff29ad753017522961fca2e479bd982f00f9. 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/ES71G2032764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf875f061311f3ba6c0eb40e288aa1546031e4e9a8f6e4f74f3b3310ade673b. 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/ES71G2017935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d2e702c6d78cea1f43363fc144a2cf16470c1e858d43195b48e9cec27ba5a6. 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/ES71G1951023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a3be946b2619d53ad62b4ad4250a8dbe134914a08d15bc380aa068da066a10. 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/ES71G1942620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdab311e4cd40c3fc988f76b2ebd79effc91a9496b335bd66587c5d021effb54. 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/ESA011941924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400f412a003e9a7c7ce62e8609ef9210eb01ffc73e8d309f3b0e875e3ee9f21a. 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/ESA011908976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486ed7485d8cd2d27baa4caa3c6b91b97ebfb873ef51fbf0ece6f079c5e8fafd. 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/ESA011825013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3ac1d9e0e9b1b9a15f81202c4594f601d0c515b4e51730990b712ee8ec1767. 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/ESA011826953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cc4c7e8eb2a9aa12966898f3e6916a158571cc076ad5cf19daca18c33e60db. 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/AEA0D1810273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8f97ae3f25c00a0fb52ba84ce3eacde61e968e999f6f31f92b270d3950c1e5. 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/QM4DW1738952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb0e581d90c87b5871b3e4e802b3946019e2b5a5768364f1877ef8be38d26f9. 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/QMBZ92087902.