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 0x8c75224e19f6dba53476beb45d0ab49cd7a49f8db4ed767ecae16b9ee1e7909a. 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/acfcdce2-1ccb-451b-a041-9cea08389a7d.json and https://artists.proofprofile.net/proofs/artist/acfcdce2-1ccb-451b-a041-9cea08389a7d.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 0xbb0ff8bdbfb04dbedf409d977c6c0ec357414a3712fb94c3802b8d54a9171561. 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/NLC287000044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf015f3483679eb6874ed8f108d06c45de83d70458df9beb628641729661dae1a. 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/NLC287000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d77a9289b4c3ea6b683137b87ad1e8ab659a476328f20dca6c55b3bae6522a2. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/NLC287100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312fa115c272f1d201908fcae62c0f99ac924111755884f6c3e69cdeae58914c. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/NLA317100289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2a06d397ae8fa294afb23b83cf4703ede1ef833df5252bd20119ef1a66b508. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/NLA317100244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe516ff8806243acd78b9df565b24bf736bbede6a202ad5f430f1170361c8d394. 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/NLA317100291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60b307b116c94cb709a96fb26b848a909d680fece029302e09b9e0a45d798e1. 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/NLA317100241.
Song Of The Marching Children - Single Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ce237ada52b24886668b0844b319c11e5b5287a462d9e590c0e5e23c4d4ff7. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/NLA317100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1731b23beb717d0448106ef9a97bae54c1e674935547aa2ff094c5d2d2c33426. 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/NLC287100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb72ccde287ccbe89715f99d39c932153118444866d6e6418bc752447eaa38c. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/NLC287100215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6852d707258088a9e43457c1ae6ef43b5d556ecf5631d677204750084b6ee86b. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/NLA317300245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74f821c1ea4132ffe655d13e3838a8b61b25cc327d2a95d2a0633d526511c1c. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/NLC287300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace5ffebea9595d02a2dbbc57c9a4bd3ee7e0c2bdfa436060324a064fba79a54. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NLA317500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc969b3edd1cc08617e1ed3deba225bc61cf6d5473d4a403fb2e44b6c926d15e9. 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/NLC287500229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c893132703ba8fc8c4d66b9c06064d45c161d5c43288d4711e0bee4655acb5e. 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/NLA317700014.
People Come, People Go - First, Second & Third Movement
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fc98659ace58482d6af658b9f4ed2f91ff786c20b9aa8b622db9dfba6cf5f3. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/NLC287900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2972d797aec0d2f8fbcafcaa9202155b1c6948649d6637e23b1cf6320dfd97. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/NLC287900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac239d1fb51b5a00147f9e9460aa6af1b569c6343c2ebf57634732428de2e1be. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/NLC287900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da67743c71df85e858579eec8ad457d2c236746d5d4894cd627f4362440b852. 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/NLC287900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f302571721248f281d0f6aaf561aee4a6144909ebf789fa02ceca9789851bb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLC287900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92043e7bf01bd8865e551011bf99cf50d0814fbf68cb02e3ada08976d1f4a008. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/NLC288100275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d51d32706d759f519f94c220dc31bd7db10d2f414125c4980d6c103cc15725. 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/NLC288100045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be2b5bfe7ae1317e52747ecbe0b7679ce218f5dae23c4f23a1966d223e430f1. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/NLC288100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afbb3e6e84164f78a16cd196d609df2018baa29a9465bbc7adcb84136478f72. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/NLC288100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35066f659d352f696e87fe10314130c16e94f48a5e8c8606d539bcf1bb00a8e2. 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/NLA317300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e682f3efe74387a3d98d7dc94dbad8e26a5cfa2db1c7fb080e41a0a83c5414f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/NLA317500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc070b8353ac5cd6bb647a82ecbff11b1e6d4320ee63b15bff22b700adee23286. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/NLA317600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98571befd8da2de0b37bf46823698eff38e9b499b05d32c6338b722d1eecfc86. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/NLA317100228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0053ee9defbfdaa920388470fc9fa88c20060e864ea30b5706cd07280272b1. 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/NLA317400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e682f3efe74387a3d98d7dc94dbad8e26a5cfa2db1c7fb080e41a0a83c5414f. 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/NLA317500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc070b8353ac5cd6bb647a82ecbff11b1e6d4320ee63b15bff22b700adee23286. 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/NLA317600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a4a212027e8ce879b6fd6cb7e8d544d80243871481d9f65a0b72164acbd03b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/NLA317000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb00ce9652083d3308713245762c53f89e367a94b5cd220a1bef8f3500e02d58. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/NLA316900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40043d546b96f3e1a562fa0dff4242fcc4c88e0590e731e6f7e598ef1765c44a. 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/NLA317100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb00ce9652083d3308713245762c53f89e367a94b5cd220a1bef8f3500e02d58. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/NLA316900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1346871bf206fc56db6521f946fc1803a3bdf825588777894873bcd9c65da2e. 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/NLC287900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1346871bf206fc56db6521f946fc1803a3bdf825588777894873bcd9c65da2e. 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/NLC287900009.
A Mind Trip over Netherlands (Dutch Psychedelia and Progressive Rock 60s/70s)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fe5ed68376fb4bbae1ded68396523e878e4391532b93ac508dd5b58af85160. 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/QMFME1596681.