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 0xd625af077be08da6e88540c9522ff8c42e94345415a6dcb01eb87a6be9b1f74c. 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/4b24c0d4-a2c6-4f4d-b149-b778cfe40396.json and https://artists.proofprofile.net/proofs/artist/4b24c0d4-a2c6-4f4d-b149-b778cfe40396.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 0x7e090cbb79b5ed74a69a81868b0fb9cd3bbb30a3fdb54967976a6b464238113a. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZWFU2498060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f259039fbfe475ef62cbdf95199e80fddb205d250411ccbbb9a503a528f95ae. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZWFU2498061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ae08499fb0eabe58cc77bb1887815d9c2c55ba67fc2b750dfebf61822e5f69. 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/QZWFU2498062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfeebf507cb3edc0bf76e969fa29e18eda7c76f8b2d7a36e82a35e3a0211367. 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/QZWFU2498063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08633d75206e1cdcf72c4f7be3f8d074dd4c69040d57cbc0cd72f251fcaec2e. 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/QZWFU2498064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f465e18603f73543ec29f4e975c7e70d68143e21f77f85d99015c3f819b2a1. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZWFU2498065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e134ff6be20bbd3d868b81713f4da47b537adbcd20a339fb88cd0c2db8fd572. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZWFU2498066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2706ef38c7f6ba14f9bb05576d56c8646443a0d9bb9b6aac0fdeaf351a4c70a0. 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/QZWFU2498067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75748a3e200dc51ef76df949e128b0d18811d179b8c9dd44cc5ec63fa43e6d6. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZWFU2498068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa513156ec5eea740590e87ff1baa809b8e049c66afefa3f2ec5a23468b41340. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZWFU2498069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639c0bd178687f7197c29332feba82ee3c2a23ed716a9c64ee06b209f9f160af. 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/QZWFU2498070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3356e07502e871693ce1b12225768cb1bf768f9b6187264bf401cd235b8e2fbd. 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/QZWFU2498071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d63fb103f15b32f2414529020bfc1853cc0c1eda9880363ee58291349c257c. 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/QZWFU2498072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9377a094d4244c606bca160f9a7c7914f11aa580c7a903b59654b73609e8e3aa. 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/QZWFU2498073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238a7bd405f89f27d53785898a89ca5a17a9c2cdb7c26649e9de9f4885d0e28a. 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/QZWFU2498074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a73e03f99bd98f0869a5a2ee3f29f60dbc5ed2cf6c8432c430c02f304185ccb. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZWFU2498075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15db1c2132d1f0b88a7148e2d62751fdea9b1a7cff48f5f04cb8b4868b851b2. 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/QZWFU2498076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca68475b0a34ee232efb7166b363be961ee827c6bd161fd9a7ea363cfd9faaa. 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/QZWFU2498077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e77db584683a32b1aebdeadd080af9e7b55c2ef6610d98c452564948cb9b373. 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/QZWFU2498078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4ba2dd9771973a485ce7207f6356900cb72cf6ab39a91a008114353ffef83c. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZWFU2498079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cf545f5e9ee3e3ed05cecaffa8012723f5be9bb49e029912cd86d13bc307c3. 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/QZWFW2498597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd541033fe0c8323536c87a55e7bb716f5ebb7c69a987248641b05d59c92c23. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZWFW2498598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bab9b93df3c61acd68f42ffac563383eaa2a9dd0a97682281bad68757e1c4d. 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/QZWFW2498599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588e4c9b26695d68a709e48032039863050769629c88d48d38c9e8f0195b750e. 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/QZWFW2498600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82c4b83c854d75c19657723466334683974d255d008de3de2e00f659edff148. 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/QZWFW2498601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc42c853837744a9c28dc60d6e26d9cb2ab6e8293192279a9963d84a1fe08e96. 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/QZWFW2498602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2395c81c7e393e4c6c7935f4f2299b4960ec4ee742962d38860d3ad143f6a2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWFW2498603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d580c8f1bddbc1967459455b6d9ee152cc6ce19e29d543b8fee32a18b676fb. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZWFW2498604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b765957e9bc4a058ec597c4b45282d1ef6952c64f7676af70a052e422cbe21. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZWFW2498605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e5eeee043b701159ba5cccb4e4931055b512df08cf68ece3e04bb9c99ded1c. 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/QZWFW2498606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038244cbe108f6fb2a4830577358306d0938e62b86fae0f1d15002e1c3712df3. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZWFW2498607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67277269109d87be21b91de7c23a04ad117fad337e7a8b2a808ba192580eda4a. 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/QZWFW2498608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735289df53e0b62a8406cab0f4bb845e964bf1c36db5a7259310880622a731a8. 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/QZWFW2498609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922e8bb5d88359db9abc3715a00dcbd9340a46a7bf7e666aecdd5c7079c1c915. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZWFW2498610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890fcdb0b01de58429f1b9ecf37d71a493570966491e697ddfd4cc797c6d85f6. 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/QZWFW2498611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d67067c08a859fe85c9126aba7b82a1f94af5b93decad8314e1c7a99e8941c0. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZWFW2498612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70ccd0abb5ad931bca912549c5c6f3ab9f6fedeb1b9e04ac43a0417a4a49ce6. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZWFW2498613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e569c261026cbb21e611a69bad85d77fe589cb1b928a9950460eec3ad2c0f09. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZWFW2498614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dacbd02855b7efa4fe3a17ad5d86df03ced2a71fae43f0383c66f699a3fee1. 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/QZWFW2498615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0380587818c838c3bb902cb80593cb82184af48174675480505c9593642a51a7. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZWFW2498616.