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 0x57de095aef95e3761bef8b8759c1a1904b95a0daa0a6e6905a72356e2cb6fd19. 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/47c8f34b-fdb9-4fde-abb5-6c54c51f7586.json and https://artists.proofprofile.net/proofs/artist/47c8f34b-fdb9-4fde-abb5-6c54c51f7586.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 0xb90f142c7c0005e57df1942aa1205e23727e5eace0d0274a481499c08a7f1784. 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/6m1qXSuHKPJyevbvRg7FMM.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/6m1qXSuHKPJyevbvRg7FMM.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4177d7b2d211504db70b0c5a19e5475b50f7e48dc7b43e726c72922f70e7e1a0. 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/0x4ss0guhJRkhOXwoDsFSe.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/0x4ss0guhJRkhOXwoDsFSe.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cac3132b1656aea7a7c830d56ec9e4d8fa08cb27b8a0b17c48b47ca3ec8ae40. 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/4tQvcwZekqZ1PhW70iVjyc.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/4tQvcwZekqZ1PhW70iVjyc.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747486308dc9ab61fd86afdb46239cd802b5dbf561356526d080bed0aecce185. 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/3t8zP8zsZmghSVhHscpbmD.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/3t8zP8zsZmghSVhHscpbmD.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38e2ec8cb0f626449750e6e9973cb39a224e8c611230063c7960e4ddc701941. 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/0CYLlIT1ZTxMGWQ8LLiXdi.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/0CYLlIT1ZTxMGWQ8LLiXdi.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a43b21bd66f6801c883cf6b1e3ab980f1c608490f42d9fda21243293c9059d8. 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/3Vmq9lE9ayaO1wpcdxjn7c.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/3Vmq9lE9ayaO1wpcdxjn7c.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abf7c28a28688c342b48ac5ff013f6439e291d2ac7be0a0883c3eedc637c65f. 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/1mv2ZUjvqhzJVfE34F6sxV.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/1mv2ZUjvqhzJVfE34F6sxV.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87f2f2d7a82f733a55119bbf092aabd4e5b3ad5478c617a7d9afa7ae1ac572a. 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/6j1Pi2NpuQvyFcXv9J565t.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/6j1Pi2NpuQvyFcXv9J565t.
{"copyright_id":"0xd2de24a73eadf969fff4a949fc1976657e2d438bbcc76ebb781b4b83f92fc769","isrc":"PL59G2000014","name":"Co Cię trapi","registered_at":"2026-06-05T22:18:53Z","spotify_id":"1guETYgJvhxpTV3odteKQ3","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2de24a73eadf969fff4a949fc1976657e2d438bbcc76ebb781b4b83f92fc769. 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/1guETYgJvhxpTV3odteKQ3.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/1guETYgJvhxpTV3odteKQ3.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03353fae578dcf9af9301916e0067038f2762d557e6420b0146c3bf053b26da. 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/1MWPqSbU6V8ifaF4dRrtMq.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/1MWPqSbU6V8ifaF4dRrtMq.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb28bd76be9653e831ef8bfb7ba5c7630c6cc26e0db3161fda5580687c3793d7. 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/2Lz2J0Vyb9DYjPOx3kdnta.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/2Lz2J0Vyb9DYjPOx3kdnta.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff84f8655571f10d871b8bd688e15847a454f292aa3a321705f25dfaa0189e2. 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/3j7BonTlKPIzwH7QkluaLO.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/3j7BonTlKPIzwH7QkluaLO.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac3ce2c5464c279675058f3ef69b94dba21d519ce5740b8644fb531765cffa5. 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/6VyvKOzBJcduOpdpB4vvdJ.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/6VyvKOzBJcduOpdpB4vvdJ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7852b169876147b37cbb90351d62e7adc9127e7c67b6248516458ff08ee4e6fa. 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/1WhArP9M1p37gc0eGsySej.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/1WhArP9M1p37gc0eGsySej.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6f730b97861b04920a6b972563e39117be1d197af031f95ccf7edd4a25bc25. 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/1W21j4yeMD3YqOr0HV913t.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/1W21j4yeMD3YqOr0HV913t.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed55b6c4953243a0c0a3f475afa3d9dfee5bba6995cd7891f5df6ff0cb83b6d1. 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/3IZBigmhqwSUbHnCX6JRiv.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/3IZBigmhqwSUbHnCX6JRiv.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8444ecba186257372367249ef41a37b49a70e1f388236b7a762a79caf371dc00. 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/3AVaeWtKjo9kM3KGA6PFzV.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/3AVaeWtKjo9kM3KGA6PFzV.