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 0x7a58931638bdcbf78c563dbfc9aa2b55a7a7793a3393a0c81e9d117501cf84e5. 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/ed2356a5-9f4b-4fd0-bb6d-f841b95b3fee.json and https://artists.proofprofile.net/proofs/artist/ed2356a5-9f4b-4fd0-bb6d-f841b95b3fee.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 0x8e549e3814eb9001ea28f59bd0cfa0b4e3ad8af624589d074823f3233cb39e6a. 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/0qk4XjfSnQollNCjlOgCin.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/0qk4XjfSnQollNCjlOgCin.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc6532932f999c4cd8100c32c49ce8f9c8c8878686f81d3175a733af500d535. 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/6E10YnOtlWUwsikd7HfE3p.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/6E10YnOtlWUwsikd7HfE3p.
{"copyright_id":"0xd15da953545c1b6a9ca894848e3b51acfd4bce3ad5c194e7a7e14a90282c77b6","isrc":"NL1LE2302868","name":"Lost Woods","registered_at":"2026-06-11T09:26:59Z","spotify_id":"1KvMaEiZAxdyi7rqdstKlS","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15da953545c1b6a9ca894848e3b51acfd4bce3ad5c194e7a7e14a90282c77b6. 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/1KvMaEiZAxdyi7rqdstKlS.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/1KvMaEiZAxdyi7rqdstKlS.
{"copyright_id":"0x69ae0d8d5eddfcebfa2c42f82af5d4cedd029460feaad7e1e0bdbf94c31dfb76","isrc":"NL1LE2202586","name":"Indian Summer Rally","registered_at":"2026-06-20T05:53:45Z","spotify_id":"6oa8jPwYaYLfRWf6gjL20v","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ae0d8d5eddfcebfa2c42f82af5d4cedd029460feaad7e1e0bdbf94c31dfb76. 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/6oa8jPwYaYLfRWf6gjL20v.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/6oa8jPwYaYLfRWf6gjL20v.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0dd6fa53b0d1154a362e77dafb3cdaba5f8ef0830c2fe7adb03c86b49aaee2. 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/0pZUFhRjTc7ClF2GbJZM6c.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/0pZUFhRjTc7ClF2GbJZM6c.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd6ab08f5fb70defc3fde32f9df8e5b98b46b4265de13799a05c52a356d502f. 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/4bG2KB3ChxxVa697HTNDQH.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/4bG2KB3ChxxVa697HTNDQH.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d15f187630729b21313aafbfe633d9e857b46898b7fd7acffe7966f4107d16. 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/4PHUAJkhwjqIYch9QKPxlA.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/4PHUAJkhwjqIYch9QKPxlA.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab75a432be86903433aebb0134b0e4efb1613b74bd6d9ca426a517006ea1cde3. 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/0CS8o4PfoUa1TNYXvEPvSc.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/0CS8o4PfoUa1TNYXvEPvSc.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38def0fa6979f2b004a9ca529ea51f68c797c21c6dc569b215688e52680dcb1b. 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/7mFZ72bJdNx0Ps6uw9cPlw.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/7mFZ72bJdNx0Ps6uw9cPlw.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffa723252c856b6fd2817631f936daf356acf1ae0491e644e0678ad81863b64. 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/5Eu6WTTrfhIZVhVIkA5VlT.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/5Eu6WTTrfhIZVhVIkA5VlT.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fac714007964f977465fa6fb866ea8b8a2369542db9f233ce5283dd7f05239a. 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/47US7CPJSJ8B4kXLUmez7c.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/47US7CPJSJ8B4kXLUmez7c.
{"copyright_id":"0xfa8c6ac81020f8c02bc1a703c1f615ada0f5ed3b61cac8ad1b44c47c9fc9a7f1","isrc":"US3DF2121625","name":"Hidden Gems","registered_at":"2026-06-22T14:19:21Z","spotify_id":"0k9X9cxDezxWYOyDRf4Cub","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8c6ac81020f8c02bc1a703c1f615ada0f5ed3b61cac8ad1b44c47c9fc9a7f1. 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/0k9X9cxDezxWYOyDRf4Cub.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/0k9X9cxDezxWYOyDRf4Cub.
{"copyright_id":"0x79a4fd473aa94a18e66197c4b551ab8c5a20cdabd6d2528a4e2140b2a3f7dd5f","isrc":"US3DF2121632","name":"Leather Shoes","registered_at":"2026-06-27T22:59:56Z","spotify_id":"4jLIfUaWuxojeat2ukxXZa","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a4fd473aa94a18e66197c4b551ab8c5a20cdabd6d2528a4e2140b2a3f7dd5f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4jLIfUaWuxojeat2ukxXZa.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/4jLIfUaWuxojeat2ukxXZa.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60fa68a55a9ec80c123e3a24239c22c88f877154a34746deac43533a738b32b8. 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/7o3xilR4g7gg19ueAkybKf.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/7o3xilR4g7gg19ueAkybKf.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57751625f50aded41537adc0c03780198621db20b6b31fba9553b76a77bfb0e6. 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/3CGry9C3LwEH3TSdjv0wCc.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/3CGry9C3LwEH3TSdjv0wCc.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334e1f403639e4b1738f4ebcb3376c14c1643e5fd04d2d79533781e15a83d45c. 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/229xCoKjcx4o48ylt8Eubx.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/229xCoKjcx4o48ylt8Eubx.