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 0x429ae265c2ca4422ec81f7bad9b3a65196f74b03c94bd53166524e0cf8387336. 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/0d7fe222-a49c-4fe1-865d-4ab8664fb7b1.json and https://artists.proofprofile.net/proofs/artist/0d7fe222-a49c-4fe1-865d-4ab8664fb7b1.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 0x695a7269a5293147ab9a5c29e01ce2931a787e366ba9318cabbc393f27f18935. 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/0HbLMn2hYPMcVVvNC7pPxJ.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/0HbLMn2hYPMcVVvNC7pPxJ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85dbc7662a34c9b1859f8313467a3a8c7c53e582670f11a1bb6954ca991f910b. 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/5s4WwUvMPGMEinWjiIH55I.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/5s4WwUvMPGMEinWjiIH55I.
{"copyright_id":"0xdf2d6f8ea22190fc13b1e1756e90b1fe91c8fcc8e60e266f5d346d9cbfb753a4","isrc":"QZK6Q2471909","name":"Halle Berry","registered_at":"2026-06-06T06:47:15Z","spotify_id":"3dB3fRkf83paVEKExAJCQh","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2d6f8ea22190fc13b1e1756e90b1fe91c8fcc8e60e266f5d346d9cbfb753a4. 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/3dB3fRkf83paVEKExAJCQh.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/3dB3fRkf83paVEKExAJCQh.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6edff7aadec61b895f87c77bc6de6a1e92f61bf0310733a37d37056d39a00a4. 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/3CYYyk8Pr0VAXoWqhwriOw.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/3CYYyk8Pr0VAXoWqhwriOw.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36bcd3974a2a68956e33f8c2a0d7c6fb3c03e43c4198941ed5a13bfe4683f6f. 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/61Fgo7az4lKB2sVPxhoCCO.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/61Fgo7az4lKB2sVPxhoCCO.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff187a5b3d252f0c576d8d79540f75092cd73d5b271d6c1a2d28a04587c9c0b8. 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/6CnVtUmo4DNL1dD9N6QIbm.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/6CnVtUmo4DNL1dD9N6QIbm.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc710faac7b80ed862021b1063254e28f819d97ec5e60b38a3eefa9de8f7b4060. 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/2i2IqwDNYuZj5rdMkJhdHF.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/2i2IqwDNYuZj5rdMkJhdHF.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f8878f04ee4033a156725a6dea65fded72984916692af3330619fc19b8af52. 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/20TvUFRg4JMh44a6Qgcmq4.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/20TvUFRg4JMh44a6Qgcmq4.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908b3a1a4bd19775d2af4afbd52091b6e85839eb10aecc894d09109469427338. 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/4pvjCe9P0jhJ6CSV3mZtdQ.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/4pvjCe9P0jhJ6CSV3mZtdQ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c689ac2deefe4b986cf3ebe9319bb8302ac54d840649b2bcf4326e4159df121. 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/3DhVhI43lPsaT74rL5ALsL.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/3DhVhI43lPsaT74rL5ALsL.
{"copyright_id":"0x920483f3c50f84e694960b149cc0c1e9a02f76bbec85a4e32e6c074f9d175eba","isrc":"QZDA62259531","name":"Involve Me - Amapiano Version","registered_at":"2026-06-09T23:46:08Z","spotify_id":"1Ypf3tInamUbkbdY8cZeE0","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920483f3c50f84e694960b149cc0c1e9a02f76bbec85a4e32e6c074f9d175eba. 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/1Ypf3tInamUbkbdY8cZeE0.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/1Ypf3tInamUbkbdY8cZeE0.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa057c86967a8393883b8b844dfddc632476aae54871c474f2ec6602198b5fbbe. 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/5G8z3qvDJ2BS3aZ3AX63mq.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/5G8z3qvDJ2BS3aZ3AX63mq.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5803cd02cf51469e0d46a71d773678265e976147422b2edeb932a26ce40e013. 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/6Wyzcm2oVGBeinxfIPbZiR.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/6Wyzcm2oVGBeinxfIPbZiR.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe759ffc9b20837cacf19100a916588447f40c7805aa0bd03cbf2af0db39e98d7. 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/2MbpMf7sKYDlXE9Xvca1UN.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/2MbpMf7sKYDlXE9Xvca1UN.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b19ad7a8962de9b256dbdbf61b0e76e7abd13576229e2827ddc8d22c19f63e. 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/49QQmJg5Tic7WI2S1uG4Vy.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/49QQmJg5Tic7WI2S1uG4Vy.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff187a5b3d252f0c576d8d79540f75092cd73d5b271d6c1a2d28a04587c9c0b8. 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/0X8sT4CbSSS58dweYKIuTv.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/0X8sT4CbSSS58dweYKIuTv.
{"copyright_id":"0x9e1ba09a308894cef37fc5514fcee0bb76585b7207f544f5d23d6e103cddc509","isrc":"CAI4L2400001","name":"BIG BADA BOOM","registered_at":"2026-06-21T09:47:10Z","spotify_id":"6MdwDgFwdhKf3ZGPRfZOIQ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1ba09a308894cef37fc5514fcee0bb76585b7207f544f5d23d6e103cddc509. 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/6MdwDgFwdhKf3ZGPRfZOIQ.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/6MdwDgFwdhKf3ZGPRfZOIQ.
{"copyright_id":"0xe3200f07dd34b1a3bd243e3ff318e67dfcfa7b9af0f9d3cd5df7233ddd287e5d","isrc":"CAI4L2300006","name":"ALA BEKE 2","registered_at":"2026-06-25T13:19:05Z","spotify_id":"6zr2Z3Swasi0alEuhpAtRQ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3200f07dd34b1a3bd243e3ff318e67dfcfa7b9af0f9d3cd5df7233ddd287e5d. 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/6zr2Z3Swasi0alEuhpAtRQ.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/6zr2Z3Swasi0alEuhpAtRQ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9f22b8c9f0ef40e4cd66c135e196fb3a3264c643077f4bd376b8654153734a. 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/0KuKELHPCnDwNTYW0qVBLH.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/0KuKELHPCnDwNTYW0qVBLH.