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 0x3250afd1f81e81e57de9cdf1824351a291475c981c1a45f591854917a8bbb44c. 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/ea57fc68-21d6-4141-9d0c-1268896596d1.json and https://artists.proofprofile.net/proofs/artist/ea57fc68-21d6-4141-9d0c-1268896596d1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x69a76d369cb181ae58b47f6a28acfd50e0dd9a5982a893b4f7fda10d9eb39c4d","isrc":"QZNWQ2263601","name":"Loin d'être parfait","registered_at":"2026-06-10T22:52:35Z","spotify_id":"4sDslVhDR4PbqcLEIQzFdD","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 0x69a76d369cb181ae58b47f6a28acfd50e0dd9a5982a893b4f7fda10d9eb39c4d. 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/4sDslVhDR4PbqcLEIQzFdD.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/4sDslVhDR4PbqcLEIQzFdD.
{"copyright_id":"0xa8f58bb2e27afb6a7e12df9adde81c7d6d956c282fd41374a599ea740bbedee8","isrc":"QZFZ32218837","name":"Loin d'être parfait","registered_at":"2026-06-09T00:45:50Z","spotify_id":"13ef6z149Qn5sCuQyrTjpR","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f58bb2e27afb6a7e12df9adde81c7d6d956c282fd41374a599ea740bbedee8. 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/13ef6z149Qn5sCuQyrTjpR.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/13ef6z149Qn5sCuQyrTjpR.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab770e9605952ccf72b4384fa63f54794c175e7d5350c633f293c86226a90e8. 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/70snzEuM2HyejjpXPJAPkX.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/70snzEuM2HyejjpXPJAPkX.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab770e9605952ccf72b4384fa63f54794c175e7d5350c633f293c86226a90e8. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4U7oIfqelQgImTn9qcGoCl.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/4U7oIfqelQgImTn9qcGoCl.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8907fa36379d9fb1588bc02863fdd4eb423d43b737a966fbdc29e8b698df3a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/77D8Op04yQA2daBhUKMnvn.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/77D8Op04yQA2daBhUKMnvn.
{"copyright_id":"0x6d8907fa36379d9fb1588bc02863fdd4eb423d43b737a966fbdc29e8b698df3a","isrc":"CALWX2200011","name":"Quelques mots","registered_at":"2026-06-09T12:18:01Z","spotify_id":"73PwAMKXwSvH5JJO2edYY6","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8907fa36379d9fb1588bc02863fdd4eb423d43b737a966fbdc29e8b698df3a. 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/73PwAMKXwSvH5JJO2edYY6.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/73PwAMKXwSvH5JJO2edYY6.