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 0x7e72a846ea209a82f6ad002e1502cd57b0dde59b2375b2233cddc4935bd8a65f. 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/633d87a5-5275-489a-9bc3-c131241d46d3.json and https://artists.proofprofile.net/proofs/artist/633d87a5-5275-489a-9bc3-c131241d46d3.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Smoke & Chill Beat - Copyright Free Lofi
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 0x563e0c5ce77f4726cd386a8640c9624376c89cda2615d76f12036f4ac3963ccc. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CARHN2103511 — a six-check JSON result.
Morning Chill Music - Copyright Free Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e97383e8dcc24fbd5df001ad3354277f01cb7fc36b1cd6ceff45f0e68dc0bc3. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CARHN2103512 — a six-check JSON result.
Emotional Background Music - Copyright Free Music Background
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b6d4ef641076f09c8e8d4b1de6fffb962c1d05f513c2a5f578dc86e6a5da17. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CARHN2103513 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b145e06bb0ad467d7ddcea0a793f5fcccae8b0c9660ba1e5356c5c6b8a4b74d. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CARHN2103514 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f6c3f282d7bba332226fa34e7988bf0b8359d12b85a9c3d16343dd99048bd1. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CARHN2103515 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66763e59ba74b6282c7967e6acb4c8eff56d1584ed8b7aabacfc3ed615bad7f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CARHN2103516 — a six-check JSON result.
Gaming Background Music - Copyright Free Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3482c6997aee2396c43791549cea853c19beafb194b4d5c7d29b5ed59da52de4. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CARHN2103517 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c57e488457baeaef9163d0dea6e6a210d72a5d6b8e88cba59e72901f1c52c2b. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CARHN2103519 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcaa8f2a1ae263fe1316b10b8d80bc0b5673e332e1497e9c2c75c1231f804265. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CARHN2103520 — a six-check JSON result.
Streaming Background Beat - Copyright Free Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6609748edb1d2dcc223841e3c5de6810f8934c873331b178dd4063d85bc4f896. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CARHN2103521 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cd0008908a42500605d0d130c22ff9592b264977005dc96cd95cd87f23cd52. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CARHN2103522 — a six-check JSON result.
Sad Background Music Piano - Copyright Free Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ce98bd69fa2a9894b30b99f5bfcbb65f99f9748615c93ec7a783a3ab40b2ef. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CARHN2103523 — a six-check JSON result.
Sad Background Music - Copyright Free Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907b36ab95876673cfe9f9d195086947adf6aa28157d750b5ee97ea1c558d56b. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CARHN2103524 — a six-check JSON result.
Happy Background Music - Copyright Free Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37250b3b26c29c4a0a458ab738268f491d1fd902ae1d8dbbabb8fdb23b2e6365. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CARHN2103526 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d697e7c5f10ea2b20a0675a463357a098bbc81e634518958b7b0b3ac38c63c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CARHN2103527 — a six-check JSON result.
Motivational Piano - Copyright Free Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df4a61840a6dbd555829e685d59384bf78b2cb42315ae7d48bb30a49fcfb007. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CARHN2103528 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6458b35d2bb003d03970fd14523b3073593e3560d16f48dd50a1a57416e566e4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CARHN2103529 — a six-check JSON result.
Chill Sleep Music - Copyright Free Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ade67fd6a1f75a11438a3f41e52a846a446cb95148333e97468c06d6822fb5. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CARHN2103530 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9493a948f020fbd884afdb2570688ccfdbbc876f6f9e01e0c69c7e5189028f76. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CARHN2103532 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403336651a80227b291965c7c7647cbdf21115e6b5132bf53e8d6ebd96ffad6d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CARHN2103533 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b6b6ec8da860bedfab105d687251f5fa979c915a96f989543862539c549930. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CARHN2103534 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4cc848dcb0f4abaa3828b46f2aad5fb167403868929ca1215ab30899d611f5. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CARHN2103535 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44caa3fdcec7a5ae745fc045bebe8c9cf83ec57930392385c76318f8d57b1ec5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CARHN2103536 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d62dd039f8208052e206545ef0930c0d7528cf2827e62f3a91cef0de34c28e. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CARHN2103537 — a six-check JSON result.
Anime Piano & Flute - Copyright Free Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c59bab41dbf2228058fc9a2069a8638650ab80d6dc3d4301a4f32f8d7d3f24e. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CARHN2103539 — a six-check JSON result.
Chill Acoustic Guitar - Copyright Free Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf743874208b920aeaf00917b6d61ec25dff4869df2c7e3966a8e099b71ba0501. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CARHN2103540 — a six-check JSON result.
Soft Background Music - Copyright Free Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ddd142e148a6072f7b524b3b009d0c959f8ab31c07f53bb0e5c01d84534cc7. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CARHN2103542 — a six-check JSON result.
Chill Beats Background - Copyright Free Background Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99317187e54156ef1c652d70dfb20dda1f34a2ec60b5bfb8ed31267d0bcca3b6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CARHN2103544 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81c421bd48d5e8d36eba54bf2d446efa6ec06d41b4d686363021f998af945f1. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CARHN2103546 — a six-check JSON result.
Background Music Chill - Copyright Free Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee3cd49151167edd27ad96b805a0a3f14717ed7f33f8ea05c3b6fa73d2dc65e. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CARHN2103547 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f213dce0cbcb2b9c0a6bf18f8b93714ee0b2c9ce8ab260d9632c5317bc00b7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CARHN2103548 — a six-check JSON result.