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 0xd960d046d1ead9db1deb563418ee366efefaca10a75612b181feae84a0c406d1. 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/3c83503a-b0cf-4428-9edf-a82b753a7da3.json and https://artists.proofprofile.net/proofs/artist/3c83503a-b0cf-4428-9edf-a82b753a7da3.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 0x879e0d1f1ccdc0030c60e303f70b3320894ff379e0e100a357c22bdf5890acd8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEMZ11900815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4a0c80c44c13df4bcfbc3270ea2bf52dc0e134605cfd6f84e443a98fc23e29. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/DEMZ11900823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6d14ce26cf9bc819339b9f761341acf12e399e189ccb44b6f11569563bc416. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEMZ11900827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9779512940f3a4e2f86d510e357ac4ad6ca3ff7e16cb746e8de425f186055a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEMZ11900828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5a76d799708d6534c2cfdbf8f97651bcf50dc4a6d5532cf2b623be3e306b23. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEMZ11900829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9856e235aa53aae0336c2f566e9bf397b7810c1f3419a3a62f21ae7cfbb8e4c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEMZ11900831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4965ba84b4cfeca8ac03058087b3fd75bf841d838de64e9c4e031d21fb3ababe. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/DEMZ11900832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51aeb9cc59ae7f1a7cbe6d50c38b9e68303997c7a5ba93ac990d4a4aa80f4d61. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEMZ11900835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d39e8fc1383ee99d209fd57bc95fa9b5e38ae206b3b711df5f535598c61a0ed. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/DEMZ11900850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4147f3c132ec46cfe2143127b7e43afda38fc20316261cc1fd252ea3ffa2042b. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/DEMZ11900836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c8885e74bb9b2a5a3e9870605a859a6cda29b419625d43f6fb8a2ec0c0f00c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DEMZ11900838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa7af2495d01d45b99c33a0bcf914eb25ce5c672ab8d6bf3212925828eb7d19. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEMZ11900839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4304aa4737793c0ea2d6fe9721f2e1e1ac99f575ab3f759acb2744a3572d3c9e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEMZ11900840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaaf967ad794ecc6e2a165ae75fe5cf45f7557fb596db69f33c94a248b08041f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEMZ11900841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3375df081020709b69e87481e7dcd22c996c49191a57e90cc569771ef1cea40e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/DEMZ11900842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28330c8adab88c1fc9c1d7285c3d85013141d10142e841c1bb9769322c3fec2b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEMZ11900843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46fb1856187f040572ccef4939f9debbd5f76a82fbdfc296493623e4321389b. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/DEMZ11900844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1916d053a749b7c771471a912cdc18199325112e7934e4d8ca16154c0f5f5ca3. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/DEMZ11900845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c5df19780e3f21e86ad2de7bb74208e9a3c1afc1fdcbe84c01a5ca40ac7d30. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEMZ11900846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cd3312641e7eac157eb7bd0ce1f4d5a7b906ef2049fb4eda7922096fa3eb38. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEMZ11900847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7a2724d055ce7d26eb856ec072264cc6a361c8368438083f41a7d1c51d86f6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEMZ11900848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2abd848a83f7e10cdb06c5da7c19355e3f82f0c9aaf76b326c0f80139e8dacd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEMZ11900851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629475d1f54bc61105cddd833e4c30a387ac2e216207e7c2001e917e5003ae61. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/DEMZ11900852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d61a9c79186c484766f08799d4e5c6fe931d8fccbf4bd9316bae43d5327c6e. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/DEMZ11900853.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc02d031fccca162b68d516d8159725d9c64476ef399622ed5851a5b14a783d9. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/DEMZ12201104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792307effeb3b195d349d9060c2882da73b614e176d6c5f89b187ef168de4443. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/DEMZ12201105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc94734a7632d7691ea1e27f1686262f8ab562d1ea22d83b168b095b74d245e. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/DEMZ12201106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6244d81a806e0008584ffdbb798f80e364d88bff739f85346c97985c68cbddc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEMZ12201107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a423bec932051d6e7eb595f08c3afe89310efe9d892e36f1357e6d4bbb5bcd3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEMZ12201108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07435ea6dba397018564ec27054fb875c852ab6b9b3bbb7b587fbcfa1e3a1bb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEMZ12201109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29979043bb00d8ffb3e96b84353eaddb778996ab2d6e2c994e8bc0b9210f7b1b. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DEMZ12201110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71647be6e6e21ed5560c01460c58dab7bc5b21080ad84540679cc7af82a72120. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DEMZ12201111.
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