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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a3c5d8cf7dc6e8b0cfb3e4b4a1c67337bcee26090a12326c1143c39819da69. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/01e27343-d601-4cd7-a5d0-35eab1dcb660.json and https://artists.proofprofile.net/proofs/artist/01e27343-d601-4cd7-a5d0-35eab1dcb660.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f04cc1a733c533c308df46627e8ecdc8925e7412eae6f748ed42f727a20c748. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USY242495789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ede3326df801fb27c0be43458252ec9c78ce181b81c9285a501fab029ba29a. 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/USY242495792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52bbc9859ff134c17786b0cd2801cd82084975e72533c88d98122134d2ae14f. 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/USY242495794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225ced68e615827f76650662f9f216805f48159252451125a0ec96161e8cf748. 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/USY242495795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a150af7a4e6cad5c2ea6d9e7a92fe896bc9631a2589219f2d8828437979e30. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T18:06:23Z), 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/USY242495790.
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 0x7d20e4789f05712a961c780167a582593453192f8a00c8315db6cdbd3e7e20c6. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:35:09Z), 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/USY242495791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1c8279b56cac64e661ee9ab2c185c5a134bf0652ffb0bbb974d1a11296a1c3. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USY242495793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd1a84763fbb0b55900e1666259a3beea50df91988979709e93882c712f6ebc. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/USY242495796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f648686ea05c4dcbc6324aaf650b7df6cfdb00ea5679abe1d74fef99cbfce8a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USY242495797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dec8a7a5286da6771b877cce2515ecaf6e9496db1fbf0a9f13bd7064f2d6698. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USY242495798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95864d4f7084f10482aa0a7cad8c475a04a135d3684bb5b9da5bca044f739c0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM91703554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96397adb9d3e77528106cae38b7efb9dfe8a28d9b045848b7edb3b4401026219. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM91703555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcba0843309117123ba55ebf6742009e9e196eb13e27190150c354e84d67350. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM91703556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ffc1585841664482919b4c57b4ab34910c99c61cc5bf3c0979feb9633dca77. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USHM91703563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fe704d63cd35706f190112e36cc86c302a73ea80c716dacc96e047ac5d8d33. 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/USHM91703557.
A God Closer to Home (Song for Dwayne Calizo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2008177826e6c95c54ed5de604bf3631e302c68f20184db2e5bde2aedb4536df. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USHM91703558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51065dc20355cf575f94b831977d822bf65416b9de63336fbdf9f48c86daef22. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USHM91703559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf64cca1610b35ff52d9a838ef50b170dd7de15e6df550be3359c81c01a97b3b. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USHM91703560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa607d668f02ab9c5ef2a118290a99af989454708d594cd4dfb570c2987b37da. 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/USHM91703561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe1ac30e20f0784ba4e5e8f737b95e5f3a2d2ee6b33b23f02a2a45952cc6e52. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USHM91703562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d36bb47718e2a7fd13e97dbba24546799aa68adf9dc2413f05cbfaa8e3f781. 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/USCGH1462971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d993825a7601cf8dace7f199e8dbe77d5346923d76283322c8affde0c4b059. 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/USCGH1462973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c6ea18852d7d31efc4b319618f1ec411991f7b924fbba1b932077a04419dcd. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USCGH1462974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd26ebbf3764d6db5fb62145a6114c3851f9121f5fe8e2935f5780d1234a5b5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USCGH1462978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbbebd93ad5b282c51a44fdf9281e1592cafeb851adafd55f7b9b1c7ec50347. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USCGH1462979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493bf59e09be5213ea201b659cb7e92233421389362d10abf5a1fc4e0eeb6be7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USCGH1462980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0f91c742be13d134e051fa30db3f701f2a0db96245bd0c2dad70c1a5c993b0. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/USCGH1462972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83637fce34ad49ff47c24bf603d9ec378f38be93a085919c6f05980efb58247c. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/USCGH1462975.
How Many Kinds of Courage (Song for Chelsea Manning)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73571c3665b2dbeba3f000169062266a8b94f0fa7f147fd00f354d41903afd39. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USCGH1462976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3688725634de21156516a34ace7c6daaffc46c76bf9441de9d7557f5fb0482b. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/USCGH1462977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02f08fcc8d1dbb957606248f053d3bedb32e607cc49b86bb9acbd31254240c5. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USHM21262774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314bb6f2bc5a8ac3f64bd3cfff2ea3d9ccf3165ad131fbdd19c29167bcd1fd75. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM21262776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624b63fb9cb2030905fade0812cba4d88584b05c1b76996aec546e7c14dadb26. 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/USHM21262779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2a132b514c769cf8f7038d87920bee193aec2eb4ec446537d764c057892c7e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM21262780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad971581b71a6f49518cb681c03323d8875cabfa1db10e9fb574166256bfc8e. 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/USHM21262781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efd321e65e32d304e0afaa3df07c5855080ba1ef1c38b8244974a700e0e65bd. 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/USHM21262783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9fd13cac1cf6c3f325e857e6144d00da45e301ff5e674638379b0b9c85f4cd. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USHM21262775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9925409703229928ddffd95f5037c4db8abbb97de7456eb580071c8c5877db00. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USHM21262778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ef0dbab02fc87e05831e2a2986c0ffa142beeedca9297fd019b72449d13bc9. 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/USHM21262782.