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 0x1b63d5d98902c1b994be36c518880f6387aee825cf0ad2cb150452cb56768252. 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/5c7a5cbc-df6e-4be3-863b-1e353045207d.json and https://artists.proofprofile.net/proofs/artist/5c7a5cbc-df6e-4be3-863b-1e353045207d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Fort Apache. Cine, Ideología y Cultura de Masas
El de en Medio de Los Run DMC (se me ha Aparecido en Sueños)
{"copyright_id":"0xc9b7c943f38ffca411ffbca7103eb3aeb92d773c4b1a83e4326794193ec76ed8","isrc":"ES6081141502","name":"El de en Medio de Los Run DMC (se me ha Aparecido en Sueños)","registered_at":"2026-06-29T15:14:41Z","spotify_id":"2WoMaWJUVasLrFDQnoKCy3","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 0xc9b7c943f38ffca411ffbca7103eb3aeb92d773c4b1a83e4326794193ec76ed8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2WoMaWJUVasLrFDQnoKCy3.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/2WoMaWJUVasLrFDQnoKCy3.
{"copyright_id":"0x84f88b508e6db36efaed16fcc1db102160e4cf605662935fbce96db5f94f8495","isrc":"ES6081141515","name":"Abierto hasta el Amanecer","registered_at":"2026-06-29T15:17:19Z","spotify_id":"4pDMcKV8e6TJpajDyV1InQ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f88b508e6db36efaed16fcc1db102160e4cf605662935fbce96db5f94f8495. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4pDMcKV8e6TJpajDyV1InQ.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/4pDMcKV8e6TJpajDyV1InQ.
No Somos Indies Con Flequillo (pero También Tenemos Derecho a Sonar en Radio 3)
{"copyright_id":"0x73cbb04bf708048d481d99502146e30e6cbb47eb8b87ca77a77c80b606d87d51","isrc":"ES6081441409","name":"No Gods, No Masters, No Hipsters","registered_at":"2026-06-29T12:40:02Z","spotify_id":"3TxE8yauQRAuZPoV2UPlTQ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cbb04bf708048d481d99502146e30e6cbb47eb8b87ca77a77c80b606d87d51. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3TxE8yauQRAuZPoV2UPlTQ.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/3TxE8yauQRAuZPoV2UPlTQ.
Valerie Solanas (Stop Making Stupid People Famous)
{"copyright_id":"0x4af865bce24116d0fac0da6af1a7749883fc184c0d19c5ff985d481570671d8e","isrc":"ES71G2234034","name":"Ecos de un Futuro Pasado","registered_at":"2026-06-06T10:51:40Z","spotify_id":"3RVy47kEfd2WVORIocSTvO","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af865bce24116d0fac0da6af1a7749883fc184c0d19c5ff985d481570671d8e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3RVy47kEfd2WVORIocSTvO.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/3RVy47kEfd2WVORIocSTvO.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489b3f87717a72fb22f253b94456494166d6e76e55af77e4745f29cf51da5829. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/46TftybdRVZ98lrR1G4STd.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/46TftybdRVZ98lrR1G4STd.
{"copyright_id":"0x4af865bce24116d0fac0da6af1a7749883fc184c0d19c5ff985d481570671d8e","isrc":"ES71G2234034","name":"Ecos de un Futuro Pasado","registered_at":"2026-06-06T10:51:40Z","spotify_id":"3jXvCf40uLYmMERLzmRic9","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af865bce24116d0fac0da6af1a7749883fc184c0d19c5ff985d481570671d8e. 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/3jXvCf40uLYmMERLzmRic9.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/3jXvCf40uLYmMERLzmRic9.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ba8f32eb3aca874238379c6b50aacb31110f8772042aacab84c755257a0916. 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/5ymUwvruPITk1hV5KYFFyG.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/5ymUwvruPITk1hV5KYFFyG.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca4717f0b04cab92ae68d8d50e5465b50bafda6f4c0aa87444b0153fa025243. 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/0OcP25FOLBy4lX8SZFsiVl.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/0OcP25FOLBy4lX8SZFsiVl.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6470fd3d774c9fb6f701ef4c62b9d1068f3dda957df9a2046ad28bf65af821bc. 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/4XKSau7wMH5dLX6tsyFKx2.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/4XKSau7wMH5dLX6tsyFKx2.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489b3f87717a72fb22f253b94456494166d6e76e55af77e4745f29cf51da5829. 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/4zOPkeSs2aJ2D86EtaBIXX.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/4zOPkeSs2aJ2D86EtaBIXX.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84985bcc8ec12219686f7eae29168c596f6a180566481b4be1d5614068f6334f. 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/6ztsuMakFxaHoYUD4rq9Yf.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/6ztsuMakFxaHoYUD4rq9Yf.
{"copyright_id":"0x797d46ef94fa09ccade064c4344bad4f212aa393b912d2890841e38256c9d6d3","isrc":"ES71G2242438","name":"Fiebre del Viernes Noche","registered_at":"2026-06-07T07:38:16Z","spotify_id":"3Q1QO5RQVuyzsO3lrRZm58","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797d46ef94fa09ccade064c4344bad4f212aa393b912d2890841e38256c9d6d3. 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/3Q1QO5RQVuyzsO3lrRZm58.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/3Q1QO5RQVuyzsO3lrRZm58.
{"copyright_id":"0x5dd816437f021d4bb8f4ce81e247a7f1a859a6b71867160e0d80d6f8d37d350a","isrc":"ES71G2242443","name":"Rijkaard, Gullit & Van Basten","registered_at":"2026-06-09T08:33:05Z","spotify_id":"5O2cCdmgckrzn7XoNNbUkJ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd816437f021d4bb8f4ce81e247a7f1a859a6b71867160e0d80d6f8d37d350a. 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/5O2cCdmgckrzn7XoNNbUkJ.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/5O2cCdmgckrzn7XoNNbUkJ.
{"copyright_id":"0xe13004a64eb63efceeb1ac6795adc2619dfd383b9ae33688a2c187a34bbf59fe","isrc":"ES71G2242442","name":"Pan y Rosas","registered_at":"2026-06-08T17:52:50Z","spotify_id":"7i7ywzKXJFf8mFXKWqbMck","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13004a64eb63efceeb1ac6795adc2619dfd383b9ae33688a2c187a34bbf59fe. 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/7i7ywzKXJFf8mFXKWqbMck.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/7i7ywzKXJFf8mFXKWqbMck.
{"copyright_id":"0xc4bacf0ba0de93638a6b357da5f7a55e9eddd5dc9a4547452f9990637d424ab1","isrc":"ES71G2242440","name":"New Kids on the Black Block","registered_at":"2026-06-09T14:55:33Z","spotify_id":"2M0Z5mmiEu3NBOiGl3BdXa","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bacf0ba0de93638a6b357da5f7a55e9eddd5dc9a4547452f9990637d424ab1. 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/2M0Z5mmiEu3NBOiGl3BdXa.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/2M0Z5mmiEu3NBOiGl3BdXa.
{"copyright_id":"0x8efc8b0bc56191e8c9ee3876e4aa47952d8e24dee433a9a9abb198e606093c7c","isrc":"ES71G2242437","name":"El País del Miedo","registered_at":"2026-06-10T04:11:00Z","spotify_id":"7Lv9KiLTR9OROScVWBeA4e","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efc8b0bc56191e8c9ee3876e4aa47952d8e24dee433a9a9abb198e606093c7c. 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/7Lv9KiLTR9OROScVWBeA4e.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/7Lv9KiLTR9OROScVWBeA4e.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea34b9ed0fe5cfddcc08a46d14fb5fb9244110a38ee4cc80803f97451db8d68. 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/4pZ8LOYjEO8pZqPibp6grH.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/4pZ8LOYjEO8pZqPibp6grH.
{"copyright_id":"0x5ba3938ccae083e3ed0d98a69eb7837057ab9a18838549ee4293a64e2bb7fc6d","isrc":"QM4TW1826027","name":"Los Borbones Son Unos Ladrones","registered_at":"2026-06-05T07:12:56Z","spotify_id":"7BXTCiQvCcfZyFtQ3hXQdh","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba3938ccae083e3ed0d98a69eb7837057ab9a18838549ee4293a64e2bb7fc6d. 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/7BXTCiQvCcfZyFtQ3hXQdh.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/7BXTCiQvCcfZyFtQ3hXQdh.
{"copyright_id":"0x47fdb4dc128b368692ab02991ff200626d5ec8e0bf6ecbddcbb869d4e8f53964","isrc":"ES6081540313","name":"Tengo Que Irme","registered_at":"2026-06-07T08:47:11Z","spotify_id":"72lqzTbRlYdU7DkyZrksYp","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fdb4dc128b368692ab02991ff200626d5ec8e0bf6ecbddcbb869d4e8f53964. 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/72lqzTbRlYdU7DkyZrksYp.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/72lqzTbRlYdU7DkyZrksYp.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2150b359a56be56eac718534bc52f469076d57de6829b4bfee72f53adf6dce14. 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/6w7DFIPM3SEmbiUXNrX9wF.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/6w7DFIPM3SEmbiUXNrX9wF.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5779cc0ce65d038430a81fb8207dbe01e18f4d3ef943d6b9073a25195f60e37. 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/4FjNOWxwlUgf30G9fMggpN.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/4FjNOWxwlUgf30G9fMggpN.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4fddd472e1676a3bf910119ea1b0eb6f175201af1b7ae1f4d2bc96d718ece9. 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/3q1011SDQoaYsROTK4Cz7a.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/3q1011SDQoaYsROTK4Cz7a.
{"copyright_id":"0x48776c817d313af3a69e4fe46937fcefdca7b500c53aa5a8e9f631fee4ad9edb","isrc":"ES8021500400","name":"Nit salvatge","registered_at":"2026-06-05T18:00:35Z","spotify_id":"3TwSlfvFPPoz0K1yL1Ujxn","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48776c817d313af3a69e4fe46937fcefdca7b500c53aa5a8e9f631fee4ad9edb. 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/3TwSlfvFPPoz0K1yL1Ujxn.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/3TwSlfvFPPoz0K1yL1Ujxn.