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 0xb9441f01e563d41774f2e779dc82ff2035312000578a6c4269a30e14698ac5f1. 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/4565316d-37da-40f2-90f6-3ae433f538c0.json and https://artists.proofprofile.net/proofs/artist/4565316d-37da-40f2-90f6-3ae433f538c0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x79c074dd0e8896ac8de8978b1deb065a733dd25b3cd0d9353bfa47dfa992096d","isrc":"QMFME2163587","name":"Burning Issue","registered_at":"2026-06-29T17:51:33Z","spotify_id":"48xbon9bPiaLxUmWnnIKXx","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 0x79c074dd0e8896ac8de8978b1deb065a733dd25b3cd0d9353bfa47dfa992096d. 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/48xbon9bPiaLxUmWnnIKXx.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/48xbon9bPiaLxUmWnnIKXx.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2e830ee7c93ff052cf8256b4884b0d8c344525d04789c7efef9c8016e61997. 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/6eUOH2AhJsLAK8aYWSftAK.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/6eUOH2AhJsLAK8aYWSftAK.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e5ba094b51bdb9368e6a881800040c4581df297e343a9e378cdf39923d83cf. 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/1AK0VJHlltM7O3jMNjOAf1.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/1AK0VJHlltM7O3jMNjOAf1.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e6d421cb4147064f76df7be3fd18c74161fe2856f47609ccf491edc9e83194. 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/5bksukISbQ4chVw0792EuZ.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/5bksukISbQ4chVw0792EuZ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2aa81499d4dbd08712ba0397019d22dc93a8f1cd723760e15bf8a36c8d0e88c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6K4jWVP5E3QRvOpyovuBPN.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/6K4jWVP5E3QRvOpyovuBPN.