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 0x919d3a0ef57968c488bb9f999d03a3a60b76ae71fd6dd49014808145e631b3f3. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f41506f-c8fb-4743-9600-817af250f43a.json and https://artists.proofprofile.net/proofs/artist/4f41506f-c8fb-4743-9600-817af250f43a.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 0x786fb87c97f5c73deda37bddaae7b33a3764748c8a35800034e60a5c6cd7048d. 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/NLZ291200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4bfba9dbd8f138fb1a455acdd1cd92d3e7daf5786c42301c457e222d663a34. 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/NLZ291200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a34c6929245da1482fe62141b68da4711439c6f0e777cf08f33faef38c45de. 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/NLZ291200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e53fe3f9c65335b40dd1f64f1c7ca224c03ed42eae7329f884fd2350324f03. 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/NLZ291200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a51a669962fa854de39358c8895359a5d38c54021d3f0cbacb095cc53d6e0c. 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/NLZ291200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447e96fade044ea157a627c2c9059a5e74e27ace369a8675d5bd56074c1948c3. 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/NLZ291200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b064bc116a3ec8a2cf94c2bbf12255e1820606e4075e034105714d4dd2bfa11. 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/NLZ291200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71e4f1813394bd605ef5f1aa77967d98554e965a7de28b3b14ac31a9a039fb3. 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/NLZ291200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d46581d377ad3cf25b886fcd0e4c775dc390b81dedca8b4c36454f7129aef0. 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/NLZ291200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc754452efa2244da771fba71317c403da5184ebfa8f98e920d17c2e90e719b. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/NLZ291200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d7bb486939eca0ca99753bd3087679c06325442a787478a6f0f8d383874670. 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/NLZ291200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff81c90bc297ac19eff97bdec254812ec30d2352cbcc12e91ae61c9e27e7edae. 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/NLZ291200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1facebf6a271ab7b59177b0241005a3ce255e03cc5149a3466f521ac27d8c863. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/NLZ291200249.
I Will Always Love You - From The voice Kids
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ddd80572d6cb11e16d4871fd9e9b05e1d513bde271eaa077d87c8e1478691e. 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/NLZ291200250.
Out Here On My Own - From The voice Kids
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481ab4cd71f03204b864a5a565e9f4b027c22f4feb74bbf23975f00b7af9506c. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/NLZ291200251.
I Don't Believe You - From The voice Kids
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df7ea9af175cd98aec07e12341089341bc7ddbebe515d3a2f714c35719626cd. 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/NLZ291200252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97828150cb73d4f26fb059923a96f7eb197e0353f34e9a8f1b80d268640fe71f. 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/NLZ291200253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d90dbba545f89634154ef870a837445b9d0f575ad55dd0bdbe5d314ead4f11. 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/NLZ291200257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aaa14999718da0b1a3336593db23bf1059aab4542adcf2e16b4f13dfb89bdf5. 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/AEA141807328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34111fb5433ea1581c60712def70aa9d8ba67bd0ee3b6705311c36d7249de58. 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/VNR011055495.
A Lua Q Eu T Dei - Acústico Em Trancoso / Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751e3ca4458a6e8b67f5487fb0e7837e2f28aacaafe02fb8555c6bac22486d4e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRUM71600637.