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 0xf406f99013c2cd54f6f2c2fe9fcf81e540258767eb62acd2c56d2aa6ab14b47a. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c45f2bfc-fd48-42b3-82ea-0af1d1912c45.json and https://artists.proofprofile.net/proofs/artist/c45f2bfc-fd48-42b3-82ea-0af1d1912c45.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 0x7322c490686311483f61c0aaccc82103ca69985952fe10ebe06fdc8965f78c58. 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/USDHM1905553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35753e10ef154426496780bb987d878494843fb26a12b00fbdfb42608e2ec564. 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/USDHM1905554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eeb643dc0aa086ea1b2f284ea34f4f05f6988ba963914f8df745bf078f82601. 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/USDHM1905555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1aec1edfe7b8cca886c892158d2eafeb5c750f76fa2ad8d61b32d036b40feef. 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/USDHM1905556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e5fad4c0e5265f2024889f9242aa4c1184b34939e8912028b89e5790c1850b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USDHM1905557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669cac36dd4aa5c6057d247231efac1529e27f3bff8586b83e43f16d8120306c. 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/USDHM1905558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6cf97f233068ef7402602c6bd45023189bb659bf9915238b758a7583319fa6. 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/USDHM1905559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565fb02c2fcbd17503089a606e70bf87216d58926dbd05555e6156e1d84fd57d. 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/USDHM1905560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9760bbda8ba2e8acbe5051b8c09a90e0bcbabb316481e2c108c621916806d442. 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/USDHM1905561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347c81361f0e8f4d071ba0acf3ca62e926954b968944beaf47bfc53fa329d4ab. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USDHM1905562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a519f2614d515ef4be86aeb888372f599d59b31933806e94f9e4d4d7da1e049. 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/TCADG1788176.
A Time For Music XVII (17) - Jerusalem - The Experience
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78169e7eef41b841a70936294fcc8fef1fc66717ef6368bf237e3e765a21134. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USHM81062542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d44f44f0efcc03b94f39a8d2a660ee7309f81491c75eb0884c25ebdb85bcc2. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USHM81062563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dce3252609c698c40375a80f8248b22a3bffa304fd374270a89cc0e327b15cb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM81062544.
Srully Williger, Abie Rotenberg & Shlomo Carlebach
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf695527bfdef7d22b37734c8026df6fb174a9a9d757e799f10667a4ace5fe531. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USHM81062564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072b4014752f99c5249eeca983a921cf02a2095579d3cca99533d883b047015e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM81062546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a113b43dabec25bc0427f85e63f66dfc3d8ab1e9eefc7df879e29501b6254c7. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USHM81062548.
Esa Einay (feat. David Gibber & Shlomo Pozen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88cfafa6af33d187811a4ba3a650f0b7dc3578daf262b45e0ffe728952c4a56. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM81062566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4d5e9608230b6f6cae9d98ad0d0eba84b70fe15a1436080e7362c2a472030c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USHM81062550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c992650a24ca2492a50cdf67d440fb931c36ef0bac26a974abb887785749b6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM81062567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e590c089b95782912dd56e241325c73062659ef3fdf37255b0d017451c7415. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USHM81062552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337743f0fbc94d72988db239b2873c17d2ad88732a99b4eb2320ef08cadbb6b3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM81062554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ea467c88c367970b0a7efa1d6df6257b65dc83b510127363826a850f8ceb89. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USHM81062569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0c36a97dbda498f680ac633e7c0444230d8cbc94aaa36839425a79a63da94d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USHM81062556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f79e9fb27e6bcbe34110d52837dea3c9e88a98fa7371da34b163d405a6b45a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USHM81062570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d970b5a392832ae8a80c2ecf3d7f2fe9e92cbac8a0d8acdc4329df465bf590c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM81062571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181aaa3c2a6550ab16cbf2b28b87b1d1312304b56282e21dfe73eac169cac643. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USHM81062572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be4eddf9ff35ffc4cc2032ff21976ad5201419dc01baf14619680533f5e95c2. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/USHM81062562.