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 0xaf26b776c94915b9c2608ab41daacf4ae46d465a4a9fb87b0e66e683e71773d8. 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/b3578726-4579-4525-963a-da87640fb5e9.json and https://artists.proofprofile.net/proofs/artist/b3578726-4579-4525-963a-da87640fb5e9.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 0xecf65e36c3baef1b71c072ca8a3a2721a042d227fc804e55eb10d124a7babb96. 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/ES64E2312401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79506ccc0d843ef6bd91fee5f82c63aee49c91aeb30c6c00517b99d44b73cc4a. 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/ES64E2312402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e23a5061f4840991844d9365a117de2bdf493a6de91472b4f86095e0d7c1a9. 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/ES64E2312403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fad80033fcd215eba95d83d9d543b73a782a1d4e72d80d996fa388454ec8dcf. 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/ES64E2312404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc0b7a7191fa597976826e496ac7b835fdf77984a3e3a2c6402c2d7a634c730. 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/ES64E2312405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c74b16a5cc7993114c66ec3743cda0956677b37c23ff6b65f0fd6fdf64200b. 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/ES64E2312406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0782cbc28f23c1e581d8955b5fc90fa221697418eb1ec020a22b40d48c3979. 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/ES64E2312408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ea81c161348dd6a96bb2b41011885c6096c82d37fb28ab42716d6e57f74b7e. 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/ES64E2312409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0947cc3ed786bb03dfc5176778b29755d065a0494a9058200e12ff40a11a0d20. 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/ES64E2312410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d7260adf670275b0f0692a1d6fd074e449b9d9acc25e49aac2f2f52017e1ca. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/QZW9L2373337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7106230f790fa56912dbbfff4a2a5a581f4b37b02b685410088ac7b3215df4dd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZW9L2373341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab4d68af81d621d3b431d7d23a4ed294e2f58ad07217f5d6018baac8e3733cd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2512177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fcf01311ef3722d793cf56c4817aec4d81bb7534dc99344bea97248ea505bd. 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/FRX452498659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb245594e87e50c86fa1fd23d9effa9919102dd5d77f32b379d0c6b336c00a7. 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/BK4DA2406668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957e05a3b00fdfdd4037ecd49c9946d8080c8777c46ee2d436a07d7de3650a73. 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/BK4DA2302215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73572cb1f738a0952ff618ee2bd0890d38cc48fcb2b69f10ade3fa4c6582806. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BK4DA2406656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40158b98afa69141a432977d7a75f64b471adf43835d2addbc980cdf3ed960b9. 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/BK4DA2401798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c70bac65cbb805a7e1ffeeb380943243509199fea7d6253e85803635a2503e. 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/BK4DA2406657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cf11a991c601187188ffb6b8af574b3ca91d19f44b8eb6d312083e97875076. 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/BK4DA2406658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d021586740c78ae7d645d0811959e502408cdb12c1c6da1fca93699f8fa043. 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/BK4DA2406659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f8f4592a8e8d9fe3760b158cce34f4a32aff9a1432903a3042a5936c9e5ba9. 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/BK4DA2406660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcc820d7d8743575142d4b99c6b4edd193183abe7dd3ea10de9341ac7429b53. 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/BK4DA2406661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cae2a4ee73660c1d36bfe383bcba1be3da4aa7f4335f61d97c08fda992b5d1f. 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/BK4DA2402417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89b730e8c34ce800074396ba87a06dd413506a7293c6cb4a7223b1835f4c2a8. 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/BK4DA2406662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bfa4a220844d1bbbf6e13b05545905e95e6d36bb34dd3267f07f1455822b8b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BK4DA2406663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56cceaa2866f4b02d6a67ebed14f3fedefee76fa9a7afd9431f5852750187d3. 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/BK4DA2406664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a55386007f0df2132328bbd3242585c9732462498ffe07b6eca53ca3235c46b. 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/BK4DA2406665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3059e43a17ce3407672081ce57ada4e2456cd5f27324b76c9901b60224003492. 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/BK4DA2406666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb245594e87e50c86fa1fd23d9effa9919102dd5d77f32b379d0c6b336c00a7. 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/BK4DA2406668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6558f2e2bb84076cc775868ab12f911199dc36fc1c6d3af8203dd0303cb736dd. 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/BK4DA2406667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacc556cd9875626c496ebaaa8c5900c197eb5e0b7ff24985b7651f6c6957d2f. 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/QZ93L2103235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed60d40a68409783323c20a65a5c2c83606353ec32b80800d3d3d4392b52c07e. 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/QZ93L2110739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b014fd4b0493fd545a66c9bf1480cdf9676c04063459ea96562ea6d22d338b. 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/QZ93L2110743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cae2a4ee73660c1d36bfe383bcba1be3da4aa7f4335f61d97c08fda992b5d1f. 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/BK4DA2402417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc1c6f3f5eb82fcf7ded206473d3ca164d9659689b46f62d382c1739edbb7bd. 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/FRX202206565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61396958ed01e8f41a53da49f596f120b4c1d042c12d454fa2167d4009580e43. 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/FRX202206567.