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 0xe6cb6d181f2481e5ce5426d38790ff1d2bf982538ec1c9c08bf465ee264682e9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2e98c57-b4ca-40aa-8c5d-b6f147073db2.json and https://artists.proofprofile.net/proofs/artist/c2e98c57-b4ca-40aa-8c5d-b6f147073db2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0xc6015f77bf32fb2c9dc194b7457585df9f661f70316e40e047d6cf07f5075fe7","isrc":"FRZ421600025","name":"Casse la démarche","registered_at":"2026-06-20T22:32:15Z","spotify_id":"5N5ZTXugfreGCzLLkRDwEJ","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 0xc6015f77bf32fb2c9dc194b7457585df9f661f70316e40e047d6cf07f5075fe7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5N5ZTXugfreGCzLLkRDwEJ.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/5N5ZTXugfreGCzLLkRDwEJ.
{"copyright_id":"0x00e0a42d1b598d1127786e2af5581c2ea43a55bdff9559b7bb7c7db5b13c0b59","isrc":"FRZ421600005","name":"Pas comme les autres","registered_at":"2026-06-09T06:39:05Z","spotify_id":"5D7ePTKpsNX0uaihts1nYA","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e0a42d1b598d1127786e2af5581c2ea43a55bdff9559b7bb7c7db5b13c0b59. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5D7ePTKpsNX0uaihts1nYA.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/5D7ePTKpsNX0uaihts1nYA.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca70d989b68443fb094800a015c526f232e21ed08f511eb1043c5ac8badc822. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1nr6n7j0yGD74ilJHWW3Iz.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/1nr6n7j0yGD74ilJHWW3Iz.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea25ec88f4087bdc79cf8af11c391d92fd7610773a8d6cc1377108cf41e4fc3. 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/2ADxbArbKQs3vBzpFVURxN.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/2ADxbArbKQs3vBzpFVURxN.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514da53990d3a6b9471a3170df0b603b297bbc647363903897d8e99618633f27. 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/1YM4EP7n0PEAZm5e4nurPW.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/1YM4EP7n0PEAZm5e4nurPW.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6015f77bf32fb2c9dc194b7457585df9f661f70316e40e047d6cf07f5075fe7. 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/3ujeadljyNcL9bmycMpYU8.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/3ujeadljyNcL9bmycMpYU8.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847add614ff2dc136d12ae6e9f7e8278b4a7b4ba74e97e6ed7643acf4a1b2abe. 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/18uW31TPhFphf4Y3v9WHOG.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/18uW31TPhFphf4Y3v9WHOG.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca70d989b68443fb094800a015c526f232e21ed08f511eb1043c5ac8badc822. 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/0OD2CVrlgl9DI8yLPXsowM.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/0OD2CVrlgl9DI8yLPXsowM.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32423b7a352ae3897751febc724cc8ebb5d43b29ae4540b800e641170fbd277f. 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/1Vw5QOBeEpbVyT5HaGiUpb.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/1Vw5QOBeEpbVyT5HaGiUpb.
{"copyright_id":"0x00e0a42d1b598d1127786e2af5581c2ea43a55bdff9559b7bb7c7db5b13c0b59","isrc":"FRZ421600005","name":"Pas comme les autres","registered_at":"2026-06-09T06:39:05Z","spotify_id":"60vxNKUAs6sCVOuNVqMoM6","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e0a42d1b598d1127786e2af5581c2ea43a55bdff9559b7bb7c7db5b13c0b59. 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/60vxNKUAs6sCVOuNVqMoM6.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/60vxNKUAs6sCVOuNVqMoM6.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b49a63e7b4a5c574b617262bf380f516d2adcf6cdddf04ee427f3a5665cc429. 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/5hBOPy38HAyQjOEXO0PevV.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/5hBOPy38HAyQjOEXO0PevV.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46c5aa0940cc2f6d0ac2cb96964e4e4b6bc08049a0300fa224c8aa0d09531e2. 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/6kW71kzPeRErF9y8X1MMzl.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/6kW71kzPeRErF9y8X1MMzl.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1351671d169bd7e5e8ed1b3e2d9eb10decda040c8fae52398c669e18b164490. 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/5y4xamCZ0w5b6FQkEm0dJ2.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/5y4xamCZ0w5b6FQkEm0dJ2.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1351671d169bd7e5e8ed1b3e2d9eb10decda040c8fae52398c669e18b164490. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2Eu7b1TCPT5ra4M39PZn9P.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/2Eu7b1TCPT5ra4M39PZn9P.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46c5aa0940cc2f6d0ac2cb96964e4e4b6bc08049a0300fa224c8aa0d09531e2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5Fz0iMveiMuUlh3RW7xCCX.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/5Fz0iMveiMuUlh3RW7xCCX.