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 0x76617e58b5f40b40551728c5ec816bd5707eae852be39990a866f01717431111. 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/12ffd3be-2aee-4ad2-b270-9081b761c4ee.json and https://artists.proofprofile.net/proofs/artist/12ffd3be-2aee-4ad2-b270-9081b761c4ee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x41ca8c214edd69ef4ffc297cc6e25773b1665a0ee6173600e87ceab7669befe4","isrc":"ZA40S2401088","name":"Stuck On U","registered_at":"2026-06-07T22:23:19Z","spotify_id":"5ioiy4k7ncwPRVtndDUoUR","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 0x41ca8c214edd69ef4ffc297cc6e25773b1665a0ee6173600e87ceab7669befe4. 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/5ioiy4k7ncwPRVtndDUoUR.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/5ioiy4k7ncwPRVtndDUoUR.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afd15ecc6941000f088b8b2c33507167fcb97de69b43983ef565c8f203bdb06. 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/57xXWNUS69tpoGJeLOz2Fd.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/57xXWNUS69tpoGJeLOz2Fd.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d68203319cd42025f849ce09db1c77c091d5c9c5d1f26c9ad8e35e2ea61297. 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/46KvrrgprUQXcfS4fUPu9K.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/46KvrrgprUQXcfS4fUPu9K.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da97ef61b0e75ff5dc674ebc90fc562741fd611017555f596fd992c3b5bf5bf. 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/6oqAfVoYb7mV50k14wZJDx.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/6oqAfVoYb7mV50k14wZJDx.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4046114a4e2519a8d3362010740c169c49779d1ac1b3a7eae35154d80e1f4dac. 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/5ZWEudeRMJeUrpPV0Tq0Qm.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/5ZWEudeRMJeUrpPV0Tq0Qm.
{"copyright_id":"0x213a3e14471b4c0af4f266ca7c46eaa68e689157ddc98b22aca0a6caa5fd7ce0","isrc":"USA2P2400519","name":"Jaan Kuri Di","registered_at":"2026-06-25T12:10:12Z","spotify_id":"4k4ye2yqL19jQWGOkbPOjV","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213a3e14471b4c0af4f266ca7c46eaa68e689157ddc98b22aca0a6caa5fd7ce0. 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/4k4ye2yqL19jQWGOkbPOjV.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/4k4ye2yqL19jQWGOkbPOjV.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8b4d86b88104282fd3587e17d9a64949f0e6453b47a85c09423b76bb631493. 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/1OoH9LtjF8NK2S9bKvw02V.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/1OoH9LtjF8NK2S9bKvw02V.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce218b9515e2b7355a9ee9b55c39148aa8ad59ef1957661702d63e6054855d8d. 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/5OhrrHAWOAjl7awP0jPNwL.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/5OhrrHAWOAjl7awP0jPNwL.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd36136c22f9973ad1792f76703c2d77c56a9be6b51e118b09e752706693a6fc. 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/74aN8gEJucF9ZJvNOsdu0V.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/74aN8gEJucF9ZJvNOsdu0V.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10288950fd13af6623c3328dabf08d5872f321397cd93403df985d8bbd501921. 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/1FFMZnPuHSuXfm2eKIkjJV.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/1FFMZnPuHSuXfm2eKIkjJV.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b432600491c01537be1c194e0fc429dd5b781a66ddc3b2f1aa7b1d74cc9c5d. 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/0blRKMvdp15juG5bQaaElr.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/0blRKMvdp15juG5bQaaElr.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e710a32455c0c998de65ea0e17a21c844df866689a67ec1005e4a2ebd308086. 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/5Zasc5jHaWCLLRKStYVeyx.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/5Zasc5jHaWCLLRKStYVeyx.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e16f1f5f0b7ef117324b8a98061053048db1cdc0e0ffe2f51477ed326ba7ce. 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/0l55UuzAwr0ypF2KNkkvwn.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/0l55UuzAwr0ypF2KNkkvwn.