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 0x273c046ab136d326a716b006756a546cab899b140f1562690c4a4f5117002410. 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/4824d4e7-c3dc-4ca2-9019-be588329af6b.json and https://artists.proofprofile.net/proofs/artist/4824d4e7-c3dc-4ca2-9019-be588329af6b.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 0x5098c4a26179a16d7049c89711cfd0490cddec9610e3f4c0143a2595f9ceb340. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/IEDDK1000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d84fceb6a88a19d65c2954b2034b664f6b35b85af9210c93eb4dfbe7a83207. 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/IEDDK1000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1bf1ea6c06475cb9368d8548c9e4dfb0af8e2dcbf948d6c618a9f08af86dda. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/IEDDK1300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b97fc035500fc337e0bce8ccf0a9293a2e5823f6e43e1ee71c5d3c44207dae. 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/IEDDK1300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e65390cd34c1f9c7a4708b02d3f40a38234aa79ad9ba96a48041dc8a2da4ad2. 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/IEDDK1300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4154c3fbd7a4af752bde7801fbb1cef40f3ac3e73ff5a6d89260d2ab527f920. 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/IEDDK1300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f3f7ec93b86a78a2c96842a9691656d20c5c817d1bcb8525c93e5e6b58837a. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/IEDDK1300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f7325e744f0d4cd61f4816043c56297fba9a4f117706ab59b0356d9f03ffcb. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/IEDDK1300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8433ffd4b65e46939d140fd84f5f02a8a0925ccb247e8019484b3c7a9988228a. 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/IEDDK1300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153365f782b9b3b3e98e6098fc77242032177affacee55db77f11496380f4220. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/IEDDK1300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497c0316adf56110dd7339d792d236df9bc939ad1ecbc02ab0abbc3a55ae4b10. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/IEDDK1300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9275292da0cd3b569bdd56fc95d0d5ab4518e432fd80d855ec49a57f5aa83b73. 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/IEDDK1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6ef5667afb1393bc156fe67173b8fd507f4311f366e4af9a7ae67769c535ae. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/IEDDK1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd2fbf4ed322a02042cc49d8b16084ad9d20632ebad43385954f46f412bd569. 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/IEDDK1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773f2443980fdad6024d21f798fa367b62595c349e5db326dcc0e8c4a592e31c. 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/IEDDK1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c723517209c49e8739cc7d1403bc5be7942f3b193ddf99b2d9830642121e95. 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/IEDDK2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5942d139367a50a36a2624580dbdcda7e894e381f03da5d0ca3d914fbfafcf. 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/IEDDK2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2076a989fc8b03f1110f57fd3732c0a905883c0caca25c12426ae68184f7d141. 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/IEDDK2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fcfe83cb3b132a9c53012cdbf2509f15e856bb9eb66391d2565a5cb3c53dd6. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/IEDDK2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4427ae69d49d73e1a1808b6286cfb3730c0ab39a4eec245e54a40c9600b835. 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/IEDDK2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a9f42138b7f7d25b76bf26fab928b8bdcfcf853865fe6a449438372d7d1c9a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/IEDDK2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff6e042225eea4db038dd91d2be8e22a146d77af42c891f06997b7f87b9f4fe. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/IEDDK2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86992933f2042da969a6b630f6ce5ccdbf04d38846d9f2b3417b704a6101b791. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/IEDDK2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364f9efeb276838bd939c5491a161ca3703928b10c21e3d24649380f19e8376d. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/IEDDK2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd932a3f490b05a1b363d082bb39986c514e03be76561d36ca5560f5c046a6db3. 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/IEDDK2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8782f87c66cb1a972f046372d253ca5365249a9347a4499a1390290b0b5fcc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/IEDDK2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3908367fceae45adf756913f6989f08211569f2bfb596b9e6ba3c0ab6fff3ca1. 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/IEDDK2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0cc544b14b2e2f809e4df61dc40bc45d056a39b802cf907e7bc030ee0de378. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/IEDDK2300012.