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 0x25a0166572386ef8cad50ee076229365b2504f031c3fc6dcc4c6aa88288d8afc. 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/edf14181-9c51-4e5b-97da-16cb14482d47.json and https://artists.proofprofile.net/proofs/artist/edf14181-9c51-4e5b-97da-16cb14482d47.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 0xec8372b7967cf8aa2386f4309135cd8d4478e8f5ea1d2aa2db3c5c7025a96bea. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHNB2244521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcc28c9a52934a8a5bc66101998c53b3165436f627e2232310653117f612e9c. 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/QZHNB2244522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c9f68f7f78359f9cdf23f3509cbcfda5b92e8dbabe901c134bfd5c04dc0087. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHNB2244523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27fe3a6343212746e62b894159adae2efecaf9961be79bb0d085dda578f722c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHNB2244524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674eda3f03ad64492031612300a31aa5041b34e894b0dde9830838c6480f667a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHNB2244525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730c9235acee0a2b474356f9ac0e263f1e3b26257650800bdcc74d49607e6cf0. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZHNB2244526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e64458ad3a4c03f5f21b9168bf56f26ec6597958f71f8b468af87c29ca73982. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZHNB2244527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe974a2773dde355ae797b9f47a086a58a276b28fb0503509ccf46b268eea3ff2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHNB2244529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13aa6be6230f7bfb318dd28da0ab5ac18935086b0a5fb4218b1a4cb7bf1ea167. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QZHNB2244530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78852619c370f754e04a90e836bd387f8020385f70b34be3766274bc4fba35a. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/QZHNB2244532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbc186e689e991d338bf46439c366f3971c60828ffeaae587857b24082cafd7. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZHNB2244533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3066a4a2c567dc4c05e51d1d84433629612ebe732fd75506169fd1dbcef84f26. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHNB2244535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34ac3ba4b5ea9d07eebf9720f2c5be8edf7597cf4d24609ed1a6a441c46643e. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZHNB2244539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056685ad52bf1fb068eed7c133d0eb753901cbcb1d2bb64a1971bb340364874b. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZHNB2244541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c3af219bfc17bad17b0be1acda00635bb6c0ca8fa632eb04c32501eab8ccdf. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHNB2244545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1917f3f7c19aae9231e696edf5f315bf7e3a24083eca8742605374930792d1. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZHNB2244546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c59830d2a12c798ecceed82e6e48fe8f41a0a5360acab0dfae444732504963. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZHNB2244547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35ce1113ea981d7e9578d6583be9d36338edad0c7d048cdcce22afc0c15fc59. 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/QZHNB2244550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446bb22c77bc6a614c2e6efb7fa02cd2d29d41e08238a3510e4f0d9cb45f45aa. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHNB2244551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c491857ef04a23580a14d1bd29368894126a1afdd8109f279bdd67f5288006. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZHNB2244554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725e3a99831dd6ba372cb26435283d54a92b3e44b3438f8adff84c434ae322de. 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/QZHNB2267100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b574c33a5fdc7a2a7b6fa488d8b530fc86e8a5ea95b644fe6f5e1c2e224cccb. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZHNB2267101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b33fe67588f12fd5070e5009f30df0d47ffd10a5ed5c1b66a61477bee92f752. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHNB2267102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2657e8fa64fcb74e99f6a13a5edc62c2e466a96bd0cf8092345e19f330cdddf2. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZHNB2267103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76aa1e45c4f96e26ebbfe633386c06488a06996dbc3fd452322624872acdad6. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZHNB2267105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a41ac0350366d72031d846f1915d06f9c2c240fce4b2a8e1443cf348739aa4d. 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/QZHNB2267107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851d9cb648b7dd3d082e44397294485535942e95b8dbf4aa92793a66f9cb028d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHNB2267108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b4f87916574e70672ce06d6ec67de4e0ae1e66db79963134f535ffe02b2cf9. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZHNB2267109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78aa0bc93d9a73f0058533bc222f95ccd9a650ed0785ace92a40d3728efad6a7. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QZHNB2267110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd17a17c28512b4bff1f1f7d4f398544f8faa273630a98f5c43c5f36e012f04. 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/QZHNB2267111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92566e6d7bac1d0ca46eaf84e3886e75a6d7b9bc0dc15f197b49d912b049aa13. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHNB2267113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765e98b1d541a9147edf4fd6927c742fe5da44093580f01dac2b081d27f9f439. 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/QZHNB2267114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43ed90a40ecd495dbb2598fe494a3126e3bf43153199bd4a2f8d972bee54b6e. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZHNB2267115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68749cac86e54977a5d8882ed424bce3e27615c75617777fd37220f6a8b314a1. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZHNB2267116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b05850fba2d353242d7b7388723e46a523e1fcd0e30208196c326fb59c5a5d. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZHNB2267117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd944f8d1960b3a138bebc3afcd797701c016d4361cc1beaa9b89bcc883b645bf. Chain 2 (Bitcoin): anchored in block 956777 (2026-07-05T11:01:08Z), 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/QZHNB2267118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d6b73ecaa602c609120a3a36ca3d0290df194d0f05bea60cd6e9505d979a9e. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZHNB2267119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d7639364e186f71d60b267126ae1105350c297e0675b20475478c4cdb8a167. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHNB2267120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fff0c50f09d8ad3aab4f9614bdfcf91054bef6de9021d40727597068c9a989. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QZHNB2267121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb716838ee30d38982eb299f3c3d601d5cb8a5c4a759dafc39e8893337e72278. 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/QZNWQ2291391.