1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x29f9a342597e7cd79ffdeb98aebb95b542e9bae4401034e5b2ebd634d56a4564. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b504a92-ccbb-4c8d-87bc-c65649878dfe.json and https://artists.proofprofile.net/proofs/artist/8b504a92-ccbb-4c8d-87bc-c65649878dfe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0xe6d24beaaa7282a06834ffe624a5dd8fb41fbe7d503226aa6596320cf3b5bacc","isrc":"DKUM72400244","name":"GREEN GRASS","registered_at":"2026-06-04T15:55:32Z","spotify_id":"1NUvIIhVZU0lKyZ3aP40SC","type":"track"}
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d24beaaa7282a06834ffe624a5dd8fb41fbe7d503226aa6596320cf3b5bacc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1NUvIIhVZU0lKyZ3aP40SC.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1NUvIIhVZU0lKyZ3aP40SC.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf85d2ba22760670b5d4913c70fd22d70056a75d9e54e9f97023f9c305d040d3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3Vo4iueKVM9o2BurvSJagg.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3Vo4iueKVM9o2BurvSJagg.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e074aaeb3b280a58b52d6f51ba62036fc51bc593ed0dd79429d7aafc6ebc88. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/14lkD0owJuYgUC4I6idF59.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/14lkD0owJuYgUC4I6idF59.
{"copyright_id":"0x6d1f243b233b82ae58461d0106c9bc46ff74452bf4deeff04c3c94db1eea1ca5","isrc":"DKUM72300605","name":"Hey My Love","registered_at":"2026-06-24T11:27:46Z","spotify_id":"79NAEFXVhc8ACb7bXDRj8o","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1f243b233b82ae58461d0106c9bc46ff74452bf4deeff04c3c94db1eea1ca5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/79NAEFXVhc8ACb7bXDRj8o.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/79NAEFXVhc8ACb7bXDRj8o.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fd5f97e627970a94c72eadfdaf000f24f867e3489fe3f82bb5bd4561a4ce1b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1642JxyQpXh8rPvr03mmOt.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1642JxyQpXh8rPvr03mmOt.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997a081c538f1e3c7336ba1f213872b1afe4cca3ff93892c77c2b99a46952b75. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1L1x0IlfPWHTMBexd7tNMP.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1L1x0IlfPWHTMBexd7tNMP.
{"copyright_id":"0x2f36f4b3ea8cd9ee9043e4e305cc38d403add243516657117aa7d4e967bc5db9","isrc":"DKUM72200421","name":"Something About Her","registered_at":"2026-06-05T20:39:15Z","spotify_id":"5YL9rgtFHTJpX1v4GKFK2h","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f36f4b3ea8cd9ee9043e4e305cc38d403add243516657117aa7d4e967bc5db9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5YL9rgtFHTJpX1v4GKFK2h.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5YL9rgtFHTJpX1v4GKFK2h.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08decebf84f8f22efcd3084ebaf9827417e0d0cc6e5f603f8c61451cd564c3b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0stt95DWAbniakEVL3vXVW.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0stt95DWAbniakEVL3vXVW.
{"copyright_id":"0x927a1d8301a2dd332070b0178be16c1a164ce6b1aefbbbe196485030b3e858c0","isrc":"DKUM72100295","name":"Fighting for Your Love","registered_at":"2026-06-17T23:15:20Z","spotify_id":"4h8WvCHopcoHXiq9JJXGt5","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927a1d8301a2dd332070b0178be16c1a164ce6b1aefbbbe196485030b3e858c0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4h8WvCHopcoHXiq9JJXGt5.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4h8WvCHopcoHXiq9JJXGt5.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eecc664e62d7f8ee0f996ca702a1e44f00cd70164be3a7de548629c60933b25. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/24jM0fOdn7IJSU59Ac779q.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/24jM0fOdn7IJSU59Ac779q.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd801246e7b6e8c9c946204e2abbdce41c16bfe39a80bb0ffa13874593f3b824. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7sSgwF4d1xzDTOPAYxrapg.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/7sSgwF4d1xzDTOPAYxrapg.
{"copyright_id":"0x44783e6dc246c16c3e6bfba1a4fd4fdae92ec8bf1d2db7956478d259e62f0b2e","isrc":"DKUM72100297","name":"Flower Song","registered_at":"2026-06-24T11:29:37Z","spotify_id":"3kNmxJQLtcSYVxBWOyIq2B","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44783e6dc246c16c3e6bfba1a4fd4fdae92ec8bf1d2db7956478d259e62f0b2e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3kNmxJQLtcSYVxBWOyIq2B.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3kNmxJQLtcSYVxBWOyIq2B.
{"copyright_id":"0xf9d699a3af297594b0761315b87880177091eb5ab33013aab8774bc629ecc423","isrc":"DKUM72000910","name":"Might Be (LittGloss X BATHSHEBA)","registered_at":"2026-06-18T15:04:07Z","spotify_id":"4vmgzDuKJrqJQ1wsRF2xa6","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d699a3af297594b0761315b87880177091eb5ab33013aab8774bc629ecc423. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4vmgzDuKJrqJQ1wsRF2xa6.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4vmgzDuKJrqJQ1wsRF2xa6.
{"copyright_id":"0xd4a00898ee3d5694d0db0d6d4ab4edc3c823d9f7aa9a759b7ce4f238419db387","isrc":"DKUM72000801","name":"Lost Your Mind - Acoustic","registered_at":"2026-06-21T00:22:48Z","spotify_id":"0gUdW8CvdMhpZ6JyGpB5sK","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a00898ee3d5694d0db0d6d4ab4edc3c823d9f7aa9a759b7ce4f238419db387. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0gUdW8CvdMhpZ6JyGpB5sK.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0gUdW8CvdMhpZ6JyGpB5sK.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69005ddf9714f16b691a7e07cec5e7d1b1dbbb2191db9499f4c2106b225c30a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/62nmAZGDVadHJA419MbGml.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/62nmAZGDVadHJA419MbGml.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcda91cf85967b02e108f4993367095bced131e61c0cc80f3bb264b98efc0e9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4MGviVZnZI6bNrTqt2ZaBv.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4MGviVZnZI6bNrTqt2ZaBv.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ea2675e7cd927b4a2bf0042bd72d3e8c0ea4c8e96d992ce1ebc98e3ecd3b8a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2gPSJ0JCXpFx9GWiuIE2wO.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2gPSJ0JCXpFx9GWiuIE2wO.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d699a3af297594b0761315b87880177091eb5ab33013aab8774bc629ecc423. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2sD9qp5173nYtKGTPQBtZP.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2sD9qp5173nYtKGTPQBtZP.