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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 0x3e03acb9d86ac71942dc6ec22e03498c7fa03eda26f174934b3ef6c13e89ca54. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f5c5f3d0-5113-432f-9fab-118247c6009c.json and https://artists.proofprofile.net/proofs/artist/f5c5f3d0-5113-432f-9fab-118247c6009c.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 0x42fbd2d6d082308a4f2f39dd78b8c91c65579bdee0017ad63c8a8a1c81bf3966. 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/ES8740712204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94dc17062489cfa3e66ce3e0c95cec41e975870260040d3e72f8d42eed92bca0. 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/ES8740713201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16dbd533fc0a4e15174f064c521155414181d0a84fd885983f92a6e05a9ef30. 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/ES8740713102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4949a5ac3b137e0a137679fcdfaa59bea70788c857405117d7ff82d3b48bd09. 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/ES8740713203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefae9ff6935537b2a2944d10127414d2c5f1d05afb8f6eab6724f0bc3d9ea7b1. 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/ES8740713103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443305c62383f2e049ace5d9b8375cfee075a5e2ab571f06280a976c8ba656da. 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/ES8740713204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e347bdbdabe69a4b1a2b09952c29d358329c74aa46c4932b28583ca2089ca29. 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/ES8740713105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d8b8e7f9bc264de980d69f0de8dd6bd21945ffc40e7e235155f85d4fa11172. 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/ES8740713205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fed751b5ca13d4d3472a01f3233aa7ac672d13ff04c7ca201c4087130ff210f. 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/ES8740713106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b6ee029512968a501b295cb2312666aeb1243345bcdd9fe64614a8638ebcfd. 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/ES8740713206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d779fb4849ee655e446eee6192554917c971d76a46295fc2121210b61158ed. 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/ES8740713108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889c6ea535cf89f7f6b872fc82d114f027d7baf9ab9667802627a59ed223d790. 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/ES8740713207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08dee917e05924f374dbc81b54455ec4632a8ebfeb16253d1e4fb24866117f1. 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/ES8740713109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00caef126cfdda5962f9df6614d7504b57ede5c9d2213f7ae4621e7985b7e24a. 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/ES8740713208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb94605bc16d85ddf3f2a02cb272b8bb78b2929e360381edd773f3786b862d4. 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/ES8740713112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1907d3ffc8baafc53cf571e344c59cb38ce50dfc5e6672bed5a450e2e505b3f5. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:23:49Z), 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/ES8740713209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74da9dec9ed98c75c9c98a14db776424283018bea9766b247dc77dd3610b58f. 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/ES8740713113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e7612f58a607ca8464370e7e3b226a8784ffd11ecd4fe657f901bcb0574344. 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/ES8740713210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1af2bf49e086e56f8fb4bfa29ab092ced9713dc0cb0e8401a5a5b4b7e12ec6e. 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/ES8740713211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5a4fdb63ae42ac41456c9bbb0c87164f6de1a619e68f54eae87cddffa0b520. 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/ES8740713212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a959f1adebfd62cac7657e128a32d7493ee2ea1fd3665f2261932f23dd7d1c8. 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/ES8740713213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8970ebcab4bc3d37a61ab598d6613c53bdee86c1049165d099e33a6bd29fab41. 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/ES8740713214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da01ae07f7264777b11349ad5e69f8e9ff6fd8deb92165c7cfa51e02eac4e34. 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/ES8740713215.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b5a52b98b8b9a767f6c0f059a26b39033b0333917af6ca71e02cc36d1623a9. 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/ES8740714102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b3ed3f1c31a870a993c94d369d34d39aacfcc14db753fcad8ec1fab43113d6. 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/ES8740714202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006eabbc03e5c288045b04a29ff29b56e4df0414c7c0261b91d327cc34dd6eab. 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/ES8740714106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68cbfa4b8b8bb3cde9423895ba3ae4e77ad38c611dc03b34088e25f3b30a6c4. 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/ES8740714203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929998bbc52f24a6a273ab24c79e0d0cd89e1800f141b91e6223d33842ed41e2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES8740714107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc26de2d5eb5a348aa2edbbd8e492e8d61ab380ad86fce5ca9cb1f097024021c. 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/ES8740714204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046ee2a76e6b163231553ae0af9af9651ebf0304e2ac591a4a429309e11db5bf. 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/ES8740714108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71c6668abe094e00be6582a87566dd486c42cb9aad021e1f8bf56d7b760bd31. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES8740714205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1051784f6ff9ac20f2d368b43715a5f0ed7052e46d2ac6a23b31587dd3ec55be. 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/ES8740714109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6618f1cb904951085a41448f78afa347ab47681ee9cf8990a51aefb9f6fe7682. 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/ES8740714206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa19ba05456087403e82eb0c738bb5814760219670b05b92bcc61c91059fc58e. 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/ES8740714111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3413dd27df3061d3096262f127e4588e357dd1c2085d40a0d805c57a3e4156f. 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/ES8740714112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65adf93df78bcfd1c803560e508d21d947667a1a1c25547330e4a9b9523eb199. 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/ES8740714211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7280ba5fee3f90651e15d2683b652b31bf45fea1368a6dfb7c8e16a362613d4c. 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/ES8740714113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad9cd064a56ba8f7db4c9052f26ba1db7d234657231625ae61799b02f6fb67e. 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/ES8740714212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc5a96fb33cb4f286d37925592da0fe453b6130c8e0376eb8f12b8fffec79e3. 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/ES8740714114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafd343badd02858aa2291b27c69b3110f3e0a1a62723d8ce859b9091b89b0af. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:06:47Z), 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/ES8740714213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e06a6ba9e7d9c9a5d9ffc5eda486538040040d41b1fcdfd66b0ecf61fd2a0c. 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/ES8740714116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc890d0b1bd574cbed75591cbca088fe5a86335e90dbb18f8108c31ddc35137d2. 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/ES8740714215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1719d0f312c86c4d0dfd112f9097bcb364c28b40272f95c1e70acf512a977ef7. 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/ES8740714201.
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 0x918a1965b82f4055cc975cbd795b8106cbaca73fb27ea3868a6731c2005f27ed. 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/ITH641000508.
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