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 0xe5d07b328c5724844425b6973f2257eebb36fd33a44984707a83ce43761ceff9. 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/f47d91b6-696c-4b93-bcad-64a43b3f305b.json and https://artists.proofprofile.net/proofs/artist/f47d91b6-696c-4b93-bcad-64a43b3f305b.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 0xc473cb0105d319a0d31219cea97ad4ef919043ad3d7a31e58f0ce2ba33332cef. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:23:11Z), 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/QMFMF1529359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00882400efe5c936a731d2f76d83d11c953f99eab915ab3d5aebb11092712bce. 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/QMFMF1529360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf52ea74566fab633e2c87a9fa6f012abe7e9bddf117e2b09241505574c0ef38. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:51:09Z), 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/QMFMF1529361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01680b960d8536ce277ef421f3dd761271a630f51267280257cdd2d55b4dff6d. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:27:38Z), 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/QMFMF1529362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f65217a4211f5c6731a49c85662c71d87334219c28b550a9107b988d18d88b. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QMFMF1529363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd32a73b9e0086c3165b2e66ec92d23c6935c81a9d082a8db2a1fb4cadfc68e8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMFMF1529364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab326976d7acdd38b229f22be8ac5d99bc50d3b3b906d94b65b21702e0bdf8d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMFMF1529365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fd6bfbf31dc6aedf8a83723b4fb3d81b1a79540563f89c9517aac5a89d3f83. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMFMF1529366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b86d4ebd738b36089127e566725b94a281665998c2bd121b75033a2948f828. 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/QMFMF1529367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f5ffb9ba802492ae87be1dac991a6c7edee8a2fae0920f958e1e8e367802a3. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QMFMF1529369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe904d4ffbd52c2156f028dffe4a741d399727584dfe364d0d462ad2ce4797a3. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/QMFMF1529370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f88d815e31e3b4565fc14de4914c8d65878fd9feb736eaa0ea871d6531a06c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:53:40Z), 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/QMFMF1529575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c632f36a689fa91de8b5676dee7bae9617a7559497b4044d394eb9b72cb6ee. 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/QMFMF1529576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad87b299b46851e7b813b24a3a22e304cc16ecb216cc73aa23a74daf8edd6c96. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:23:56Z), 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/QMFMF1529577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a73672b92d16f207c58d6d275b99aa537d8f6172b3e6615c75d28d8d8fb4158. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMFMF1529578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2522c32bab79cf8395b0f820f0a063e3583260170956f7974461d86ce5fd8981. 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/QMFMF1529579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba82197f33fd3bacca85aa1c3ed0d6a682ccb8f4a424d2c075e3f6987edd0252. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QMFMF1529580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa538c814f95903550113103e4114e0f016c7378179f4598ff73fb4bb84704fc2. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QMFMF1529581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7c0bd4437dd7d1d59ec04f01d8c816242dbcea815f764ee2550b5377de2cd2. 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/QMFMF1529584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d0dd1da38c2fd17152e4d06d70d171e41d58fcffea73173baf655b52c0c61e. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QMFMF1529585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eea48d5b12c04c8456c7a658af166e87ec49bd75e393ae6f8c33bf17f21245f. 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/QMFMF1529589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9e0b37ef1ad4c2455061821c3d0419427815fe98eef29ab758201eb7526ddb. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QMFMF1529592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc960bc6fa6254ca6f80d7283b03a0ba4aa1d86b67e805749ee0b83f3ef383616. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMFMF1529594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a01e34d6a688f7ed85e87903435fdf263ac453b27de24d4ab753181d6ac5fe. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T10:48:03Z), 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/QMFMF1529596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5a7155f5baa10255b7281858ce7865b6e60bdd3edd80be8f2956c31bde7407. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMFMF1529598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01fed1b602fbb7705be38cd2111a90dc042140e411531e8c876e4430ced56d38. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-22T00:32:58Z), 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/QMFMF1529384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbd8a98ef6641b7eeb1f4a8e277e35635137c195a9705f8467a3a603ca9f626. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:43:43Z), 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/QMFMF1529385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748e0958f22bdb30a8699232d3180e4977554c1ad5e01b64132f14bd007c3466. 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/QMFMF1529386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd09407dcd137494fac62f15d99ea5d6cce6ff2146f6c16fa98f78fb844cf7ff. 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/QMFMF1529387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa106f082f285f20601d350481bb35e838982725810bf818f67e600052ca23983. 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/QMFMF1529388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea19391a8f35b090e01bb0cd38c4e76596868e340c0edbec6e28d51e833098b. 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/QMFMF1529391.