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 0x4b2688a9c344d4abf130f0c5aa5d8cbcc848f381b1ca520d0b946fe8c596b313. 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/d3091d92-81d4-498f-9270-33370f3256e3.json and https://artists.proofprofile.net/proofs/artist/d3091d92-81d4-498f-9270-33370f3256e3.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 0xf0701ab07312b5256452a67ac7d2af4d9e75cf5a2c5fe55b2d05a17f245cbdb9. 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/3Ndb5KnKsjmLyYOAJBXney.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/3Ndb5KnKsjmLyYOAJBXney.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949fbbadd6b80e76c0d8a7a85963497573df2f42b3d675f03bfd1607455c2840. 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/1FX1RiMc8vWj4K6rHagSWC.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/1FX1RiMc8vWj4K6rHagSWC.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde523811f3914c7ed3c4213a8519d9389f285268f28881d2b0faa3ee863223b5. 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/5s90gZIttom9QRP8wwQWpF.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/5s90gZIttom9QRP8wwQWpF.
{"copyright_id":"0xa45c6c194c8b60021e846d0679e61bea5e2aa58a2aadb69fb8b899ed33bbbc78","isrc":"CNZ681900066","name":"I Got The Key","registered_at":"2026-06-10T19:02:01Z","spotify_id":"4Nylaw7aXU4Ad6uMRBvWP8","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45c6c194c8b60021e846d0679e61bea5e2aa58a2aadb69fb8b899ed33bbbc78. 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/4Nylaw7aXU4Ad6uMRBvWP8.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/4Nylaw7aXU4Ad6uMRBvWP8.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d36eeeb6c9d1475fdfbb1bc1aa904af972772309fe7e4b6bf870174d042f407. 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/4yGIDUCTRfGQG487kL21rs.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/4yGIDUCTRfGQG487kL21rs.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8128e9f0b3ec31218170dc0d793d96045cf6402f38e7a425015213a002c70da5. 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/4SV52pMmOmbR0atyRg4Yw7.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/4SV52pMmOmbR0atyRg4Yw7.
友情岁月 (电影《前任4：英年早婚》主题曲)
友情岁月 - 电影《前任4：英年早婚》主题曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed76b70f969f96640e293cb5fe1bb0922adea50b3f67c379c8a0b63b2343d9b. 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/1px8TwVPI0TWxFj3x1RGDF.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/1px8TwVPI0TWxFj3x1RGDF.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdadf2459e7cca92bb389b24f0404ba9987786668d09396eb48920e7627ba815a. 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/0C41jcA3Wmergjiw95U6Ha.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/0C41jcA3Wmergjiw95U6Ha.
{"copyright_id":"0xb11506d63e50da09a4cf2f283872b8dedbabfa255d5f4ac66318c4abe1ffe590","isrc":"CNZ682000236","name":"2020 MDSK Cypher","registered_at":"2026-06-18T13:10:48Z","spotify_id":"0bZ0WSpKCQjHiAwftr8IOt","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11506d63e50da09a4cf2f283872b8dedbabfa255d5f4ac66318c4abe1ffe590. 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/0bZ0WSpKCQjHiAwftr8IOt.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/0bZ0WSpKCQjHiAwftr8IOt.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b95681baba8dbf6332a7c63799045f4062dedd258bcc190a9f132ac83c2b20. 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/6Ss89tuWQYnXUZa83H0SYw.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/6Ss89tuWQYnXUZa83H0SYw.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c40e6abcb4deb16a44ace586a9c3fd975e059d265e9f0c2c26d9123747e065. 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/144CiLFyrkBRQvvj5mTKmX.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/144CiLFyrkBRQvvj5mTKmX.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7692aa71203d3d36164e2706dca3f7d1a0c4d8d9f0672480c659c5736fbecc1. 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/2GcD88Ddo93lBAewk8VH7Z.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/2GcD88Ddo93lBAewk8VH7Z.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa0b6a61c25143a40e729813a1c917eaa965fadfa1a0d4dbab9d62b01c52322. 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/4jqfHzhnh9EKLt0hY0dmLI.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/4jqfHzhnh9EKLt0hY0dmLI.
說散就散（電影《前任3：再見前任》主題曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4c8049ef015e5fb65af44acbdb11c2ee590601f8a7ad386c9fe07b16fb2158. 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/62prkrY5iHADajNoZrFv3A.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/62prkrY5iHADajNoZrFv3A.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6058bd5f00cf8625dd4d67d608e01c94a33d0d7559f538526c68028a050cb3ba. 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/65yj8bXDr4IsicqeiciXqb.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/65yj8bXDr4IsicqeiciXqb.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e9b434efd2ab10437a5444ae5724a14de12e94784c3cf78b9e249a2f88b362. 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/7L1s4OuGGhQb8jHTGx4ujg.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/7L1s4OuGGhQb8jHTGx4ujg.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098ba9b5db791aaa89f84606a261a3bd4af944750f1a973dc44ae2454bdc7fcc. 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/3xTBPCeBE010R7beqhyfuo.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/3xTBPCeBE010R7beqhyfuo.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684bce417e5037fd46e69de22d336c792e40e01f02c6a410bd6b25fa53b9f6f3. 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/5LGoMH5EpTZ6fyxHUgWyVV.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/5LGoMH5EpTZ6fyxHUgWyVV.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9350be26c78a1319977abb263ef37c4a1b6bcb8082f6426769c4c200a67bc8. 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/2HLywwJ1rFI9jBLOCzUwVD.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/2HLywwJ1rFI9jBLOCzUwVD.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90301fe782b0a6bab724298abb92cab040089df6485cb81259f6e5fa0bfde6e7. 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/52tgg1WlppoiTJ5CKbJmy4.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/52tgg1WlppoiTJ5CKbJmy4.