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 0x17be3639db95fc0f2582cff0f8ef72647944a803723a72ec82f4958130909f77. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d362ab71-2a89-412e-921c-d21a9ca53d6c.json and https://artists.proofprofile.net/proofs/artist/d362ab71-2a89-412e-921c-d21a9ca53d6c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x3ff2688a8b528e4a18e1a8197f429453020cb7b7adf56f2a43c64c353360c875. 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/3Uy9lHCTF8lRpwg9ribsyj.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/3Uy9lHCTF8lRpwg9ribsyj.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e39a9caa92d226d563fa8bb3573e43e665c9f4d803e36633499966e0897a69a. 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/11FtDmurxpHYwHwix8JzjX.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/11FtDmurxpHYwHwix8JzjX.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d08f6088d9f5c4b43986514e35d2c5acd882a61b440e647fbbe069d8a6115c8. 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/5XzmHUPlRGpcCyfMvL488c.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/5XzmHUPlRGpcCyfMvL488c.
{"copyright_id":"0xceeb441d9d801ebccdbd4bae1f0f94c1570a540d1ad2fbe64de26ab6659d75ce","isrc":"FRR642101351","name":"Mauvaises habitudes","registered_at":"2026-06-07T04:42:26Z","spotify_id":"0s1QWICdAhug2jCIZJ4QQZ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceeb441d9d801ebccdbd4bae1f0f94c1570a540d1ad2fbe64de26ab6659d75ce. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0s1QWICdAhug2jCIZJ4QQZ.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/0s1QWICdAhug2jCIZJ4QQZ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a16cf83c1b45d4962ed56839279990c49c1b579b2e5736f8046a2cccd576cb. 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/1F2yYAGZiIwnXIYnQs9goh.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/1F2yYAGZiIwnXIYnQs9goh.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd770dac313b7e03e3d79234e730928fd986aeae2e662fe0e8467d27316aa36a. 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/08MmLFvWnXE9aYDilWG9RW.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/08MmLFvWnXE9aYDilWG9RW.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e107aab9699b782d08aa7c8ad0d00e0878330871137588556fdc97f23339031. 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/0mUrkR8xZBgoMzTNOLstUp.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/0mUrkR8xZBgoMzTNOLstUp.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e4cce23f1002401244a6b99d2e298a116f5d8f169652e835290bfbd699abe1. 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/4GU3nTHK9vzfE61LG3iBl7.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/4GU3nTHK9vzfE61LG3iBl7.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e4cce23f1002401244a6b99d2e298a116f5d8f169652e835290bfbd699abe1. 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/2ZxmEZvJtgVcrNTSauVNKY.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/2ZxmEZvJtgVcrNTSauVNKY.
{"copyright_id":"0xeb616ac8ea051cbdd9cd0877339bc6d7e0ceae4eb23bb0535729b033f46b27d7","isrc":"FR5LE2004702","name":"Ma Piscine (Vas-y danse!)","registered_at":"2026-06-04T12:53:28Z","spotify_id":"2nX8b5L8K3fsMM4OKD5MUv","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb616ac8ea051cbdd9cd0877339bc6d7e0ceae4eb23bb0535729b033f46b27d7. 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/2nX8b5L8K3fsMM4OKD5MUv.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/2nX8b5L8K3fsMM4OKD5MUv.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a24dd2b563379a9c3a0b85351544d1703295b776131671008206d5e5629549. 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/2b1JTiOIK8QeZezAByQB6t.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/2b1JTiOIK8QeZezAByQB6t.
{"copyright_id":"0xc059ec6400250537e251708492cb1cc07b2afcbeb950c84f44884b772f68eeff","isrc":"CAHQJ1822609","name":"Rejoins le bord de mer","registered_at":"2026-06-19T01:27:15Z","spotify_id":"6KzOxjM0oYAWolyT0IOooF","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc059ec6400250537e251708492cb1cc07b2afcbeb950c84f44884b772f68eeff. 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/6KzOxjM0oYAWolyT0IOooF.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/6KzOxjM0oYAWolyT0IOooF.
{"copyright_id":"0xc5294c5f6b1e07dd0620c1cd427718d3e14fc352f13dee4cfd9567d75b945038","isrc":"CAGOO1835828","name":"La Vie est Belle","registered_at":"2026-06-04T11:54:36Z","spotify_id":"1VzsS5tPCG6reQ9LoTMUpn","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5294c5f6b1e07dd0620c1cd427718d3e14fc352f13dee4cfd9567d75b945038. 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/1VzsS5tPCG6reQ9LoTMUpn.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/1VzsS5tPCG6reQ9LoTMUpn.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686e2b0699d2a26f38cc99fe79100b9c551ca1aa2ea27f57bd274f57780d7380. 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/3JiNRVqy1JuP8Eh4LrXmJj.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/3JiNRVqy1JuP8Eh4LrXmJj.
{"copyright_id":"0xdd9adf2c4eb2f96379cd337335b19725423980ce6ba36d8dea426ce0a45f1124","isrc":"CAGOO1835813","name":"Les Tropiques","registered_at":"2026-06-05T19:28:38Z","spotify_id":"3dRZVOG3AZqt4tfre2peNk","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9adf2c4eb2f96379cd337335b19725423980ce6ba36d8dea426ce0a45f1124. 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/3dRZVOG3AZqt4tfre2peNk.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/3dRZVOG3AZqt4tfre2peNk.