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 0xa91f8aa7bcdef8ea31c7320a9b0037c21e292b64edbce47bc21bf1c06f85e01c. 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/9a871fba-76a8-4858-b1dc-75ef52868b4a.json and https://artists.proofprofile.net/proofs/artist/9a871fba-76a8-4858-b1dc-75ef52868b4a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0xe21e89c26e32a3b1bd8b6e4d5b5dec64bacfa3f974f99e03fe9cac9e0988d92b","isrc":"USLZJ2230433","name":"Like This","registered_at":"2026-06-10T21:16:25Z","spotify_id":"3fz8a4PK9w1pApFt8Awfmg","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 0xe21e89c26e32a3b1bd8b6e4d5b5dec64bacfa3f974f99e03fe9cac9e0988d92b. 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/3fz8a4PK9w1pApFt8Awfmg.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/3fz8a4PK9w1pApFt8Awfmg.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ab99a107cef9187e86a8583a19a5c061a62fb40a70ba4ba1ac348560a6a139. 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/0OtJrqbIocgjGvkKyl7lhZ.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/0OtJrqbIocgjGvkKyl7lhZ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be7e3c70495066c8fc9a850d752393d9c9c5c66fe392bf41f59209a2c5ad1f7. 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/2g1sckIF4zdXmtaku2kmeU.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/2g1sckIF4zdXmtaku2kmeU.
{"copyright_id":"0xa505510a1b555400a5ae2b92a1c0c77ead77d37d3d01c03790f9bb1fcb49dcc6","isrc":"UKR6V2320693","name":"U Like My Style - CAAL Remix","registered_at":"2026-06-19T17:50:46Z","spotify_id":"2fOI1c04cyojb5Ug7jghj5","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa505510a1b555400a5ae2b92a1c0c77ead77d37d3d01c03790f9bb1fcb49dcc6. 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/2fOI1c04cyojb5Ug7jghj5.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/2fOI1c04cyojb5Ug7jghj5.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2cebc112837894a5caf0163abab83a3c64cca5e32713972131849f59cea3dd. 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/09UtSQBDX7dvXHjWpMsfcn.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/09UtSQBDX7dvXHjWpMsfcn.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252586314c8a684583f2b69ac51533d94037a5096945f7ba2a856ee029f348b1. 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/0lBUYS5MBJax9X0W2lre46.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/0lBUYS5MBJax9X0W2lre46.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21991bb7e07ae31014674501ec27c91f82de20dd73cf38afc98099a05fa8ed3d. 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/3fGldDTHaWKkxUupXCk0uC.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/3fGldDTHaWKkxUupXCk0uC.
{"copyright_id":"0x48b2458789faf6c783a856a744106831f6c2f8b8519caaacc57a0cc3565b25dc","isrc":"GBKQU2352546","name":"Supermodel Thick","registered_at":"2026-06-06T20:13:23Z","spotify_id":"4czwcLS8x96vBcCDAFBeKv","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b2458789faf6c783a856a744106831f6c2f8b8519caaacc57a0cc3565b25dc. 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/4czwcLS8x96vBcCDAFBeKv.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/4czwcLS8x96vBcCDAFBeKv.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f9212860c26de3f9e5034e9768266ea3f551538b218c8dd892ab309496706c. 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/4mOC5cGbDGZQLwzXqS4noR.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/4mOC5cGbDGZQLwzXqS4noR.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f3f10780cf04b99cfa4fee4492c68cbe77f30e23e88823f8f0c267ceedd70b. 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/2dt0vbRGgA60ulc27eWhLV.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/2dt0vbRGgA60ulc27eWhLV.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb551f1bceb13743d4ae54c06021e0e177f22208e57f61eb2c2753413708666. 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/5jLw1rHOtF9hmVa6JoR8jr.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/5jLw1rHOtF9hmVa6JoR8jr.
{"copyright_id":"0x29033fa52a53091dc9f304235b46a3c5f26bf935f7e4c4bad53e4850b041ed16","isrc":"BCOTE2200020","name":"Keep On Flowing - Radio Edit","registered_at":"2026-06-10T09:00:45Z","spotify_id":"1T4q06DrFKG4GTMCdrT9ZF","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29033fa52a53091dc9f304235b46a3c5f26bf935f7e4c4bad53e4850b041ed16. 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/1T4q06DrFKG4GTMCdrT9ZF.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/1T4q06DrFKG4GTMCdrT9ZF.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce7fa9f94f0ce4a7e242107cee8b3366154610e11d8096058e0fafc50d07647. 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/7FWlN444CkUtClvkTZ1PWg.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/7FWlN444CkUtClvkTZ1PWg.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e926613986959ba3b441b409308669f709ef7b6594cae6db717a9525912f85. 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/5xvuP8Ged1FhE4kON5fJQO.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/5xvuP8Ged1FhE4kON5fJQO.
{"copyright_id":"0x2e8074d3fb037fe14f0bcbe7ce5e5502ea7ee6011b224bb43eb73c85962c2b33","isrc":"CA5KR2243075","name":"Last One - Original Mix","registered_at":"2026-06-27T20:03:36Z","spotify_id":"7v7ocGXa9ly7iD2WoBmkE0","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8074d3fb037fe14f0bcbe7ce5e5502ea7ee6011b224bb43eb73c85962c2b33. 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/7v7ocGXa9ly7iD2WoBmkE0.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/7v7ocGXa9ly7iD2WoBmkE0.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1065208e634e883c60dd0722875b987ae1bade54a84206a13c95de7b71a30d3a. 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/4OwSIla4QrRkKrll8QQTfs.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/4OwSIla4QrRkKrll8QQTfs.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3455d447e3f8f4919b88934a0136bb60a37634c14624c18f26ee23448f067a3d. 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/1xmyDe1vx0iVKR673z7eIK.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/1xmyDe1vx0iVKR673z7eIK.
{"copyright_id":"0x41823224303e3514c6ff31890b66b8dfc302db1ad55512e6b0ae1fe328763abd","isrc":"US83Z2205472","name":"Espirra O Lança - VIP Edition","registered_at":"2026-06-10T23:05:43Z","spotify_id":"3sU7i6ca0yThus9sWrqBLr","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41823224303e3514c6ff31890b66b8dfc302db1ad55512e6b0ae1fe328763abd. 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/3sU7i6ca0yThus9sWrqBLr.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/3sU7i6ca0yThus9sWrqBLr.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9241a973794b5a6ad87cf65b884e072871b0e9b1cef382e5c064a212cb5c7210. 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/5kDyL2zAMep6PT6zJ9QsDQ.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/5kDyL2zAMep6PT6zJ9QsDQ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216cf2c94d27b3c5524f3b236daa365bc8322a6f380e88bb029ee65e5ae65ac0. 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/2QBVm1JhK4Nr4Xz7JUgMXk.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/2QBVm1JhK4Nr4Xz7JUgMXk.
Sounds of Life: Tech House Collection, Vol. 71