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 0xa9616f92881119344f15621b0c5433c696313dd2cfde20bd745eca22005905ee. 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/d887b111-489b-4ad3-9b40-9510445547cc.json and https://artists.proofprofile.net/proofs/artist/d887b111-489b-4ad3-9b40-9510445547cc.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 0xfc8b20e189a5b64cd8b2b8476e3116874b30f2d1b77cdb94f2e18b09fce8e1c3. 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/5BeT1woR5KPtV5t02a0H6U.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/5BeT1woR5KPtV5t02a0H6U.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4882cdee3bd841512fea260c2328bd3262e58ae73c56c04a38845e7a0f2a76b. 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/6B8FONxkhE6kHJiBn722V7.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/6B8FONxkhE6kHJiBn722V7.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bf9693c8123b2610dde9a7cbadd0e0a1c52e5cfed77f7261b32fc5c7257876. 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/2qEWyJtz8vSC18mGmT9Ey5.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/2qEWyJtz8vSC18mGmT9Ey5.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778b1d37fd9513a70a2585b58a46a492364d276767fffc91b66203c3562ddd00. 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/7B2Ulp8SYJI9lEgfoZ7oNS.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/7B2Ulp8SYJI9lEgfoZ7oNS.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e248967e87f0c6f0c4a606684914199d7e8d6b4a5d0216d0963526b69978bd. 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/3DLuoPHjV5MDMqqHC8izab.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/3DLuoPHjV5MDMqqHC8izab.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd631983901e99283ba1730c3aee63634732dff77f92b46c3c51406dea36508cc. 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/3emGTdUiIcYfDJ5prfFp15.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/3emGTdUiIcYfDJ5prfFp15.
{"copyright_id":"0x33eb6f3e1756ad4b585ed4ca45689a46a3c351e3eacb22891f7540d46bab6054","isrc":"SE6QE2402730","name":"Pisando Freno","registered_at":"2026-06-07T23:17:15Z","spotify_id":"2xP0hlGZxu0UiNvAkEcyOi","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33eb6f3e1756ad4b585ed4ca45689a46a3c351e3eacb22891f7540d46bab6054. 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/2xP0hlGZxu0UiNvAkEcyOi.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/2xP0hlGZxu0UiNvAkEcyOi.
{"copyright_id":"0x7e4a736c0024b17b0556feaddd8ef83c50794a95e0484a3abfccbe8232343b76","isrc":"SE6HN2420338","name":"Haciendo Turismo","registered_at":"2026-06-26T09:04:48Z","spotify_id":"5alLcdeq0nweM1gIkbrkX0","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4a736c0024b17b0556feaddd8ef83c50794a95e0484a3abfccbe8232343b76. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5alLcdeq0nweM1gIkbrkX0.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/5alLcdeq0nweM1gIkbrkX0.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88d6edf53760307307665d9dbc9776ba61f6ecb86f54de36a1709502f2ad07a. 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/4xJpbqtDy5myuwTsuc0wr3.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/4xJpbqtDy5myuwTsuc0wr3.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cced28eee7cce9f38a3956009127b118e5e54134f40d7f8bc93f4e6765b58a. 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/6WGHNzb8UDKrkNntiTOpdW.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/6WGHNzb8UDKrkNntiTOpdW.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9274181f483c5b50bf1395d1d3f6349118610a455a2296106ae93841f466288b. 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/2IZjwq8uE8XVZhcl2fOzSr.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/2IZjwq8uE8XVZhcl2fOzSr.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05864e3e7662b0659f9016214101af59f695bae3455d26d00aa711e6bc58061c. 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/1vLKAg7ra0u5FqNYPaxQF9.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/1vLKAg7ra0u5FqNYPaxQF9.
{"copyright_id":"0x204fb19f42f340edc829b858a10e8fbf7962f3a26b3a516e123d61df9c5721de","isrc":"SE6SA2465935","name":"Amargo de Angostura","registered_at":"2026-06-21T14:50:02Z","spotify_id":"4XxArNNpsQEfbkN2td1gRA","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204fb19f42f340edc829b858a10e8fbf7962f3a26b3a516e123d61df9c5721de. 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/4XxArNNpsQEfbkN2td1gRA.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/4XxArNNpsQEfbkN2td1gRA.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47c8af63220cf1c67d4641124e293c224601eda75fad9b02e3f7a6120e4c651. 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/0ab46ZG9xaYCDXyPHVorLT.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/0ab46ZG9xaYCDXyPHVorLT.
{"copyright_id":"0xd5f2d269808a8113bba10652960ca483bb3d54c9f2996a300ba49cfbe58accde","isrc":"SE6I32432310","name":"Cuando te vuelvas un hombre","registered_at":"2026-06-23T22:35:17Z","spotify_id":"4Pw5qPSrf0WZ1XQvuzrY7M","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f2d269808a8113bba10652960ca483bb3d54c9f2996a300ba49cfbe58accde. 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/4Pw5qPSrf0WZ1XQvuzrY7M.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/4Pw5qPSrf0WZ1XQvuzrY7M.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69d97b70217cf506444705346867b2e916fc4aa86b1f1662360d3886e79cf83. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3q8zG7glNtRJB4uoSt02LE.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/3q8zG7glNtRJB4uoSt02LE.