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 0xe8ea8d9d1b2a9c09fb09ab0a6628ee43200c5570dba8059815c90b9b8fbd188d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/724b0ba2-3c08-4df3-aa55-e5958d109963.json and https://artists.proofprofile.net/proofs/artist/724b0ba2-3c08-4df3-aa55-e5958d109963.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x6f5c147a9fda5f9fd188cd0cd7ba93da7946c4ff405329c38cdc69affad3cc49","isrc":"ES5030200033","name":"Estoy como nunca","registered_at":"2026-06-05T14:54:00Z","spotify_id":"3aTSo5FtNDv6PQJFV9Jmxa","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 0x6f5c147a9fda5f9fd188cd0cd7ba93da7946c4ff405329c38cdc69affad3cc49. 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/3aTSo5FtNDv6PQJFV9Jmxa.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/3aTSo5FtNDv6PQJFV9Jmxa.
{"copyright_id":"0x47194e1e826b79df7e1b1cd0f9117b7ac01ef9834e7e8211dbab12b90cc2ef3e","isrc":"ES5030200034","name":"Arrímate pa'cá","registered_at":"2026-06-09T05:33:07Z","spotify_id":"7o2iRsUuBpuLYpfIwCzxUB","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47194e1e826b79df7e1b1cd0f9117b7ac01ef9834e7e8211dbab12b90cc2ef3e. 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/7o2iRsUuBpuLYpfIwCzxUB.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/7o2iRsUuBpuLYpfIwCzxUB.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c4d37fd8124451aa80b193262e7e0fd88ad50e28e62d37217e60f974eb6e95. 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/0erJnZ8sY1mXQDFX1iIvSd.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/0erJnZ8sY1mXQDFX1iIvSd.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a4ad2ac972b2d64f90c05ceb0980c719cce895f1eb846852ed24469c52dbdf. 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/6JqqQKeptNeBNzI6DFd1yK.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/6JqqQKeptNeBNzI6DFd1yK.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b67f2add9137a66d1d1d5080ef65844dbae009d9e10344a587c236f2ddd7e23. 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/2Njn8GAIfoOxLRbUXGRBb8.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/2Njn8GAIfoOxLRbUXGRBb8.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb56c4b14c60a59a4985d820c62b8e364bb3f99820f31ec7f37819c0465ead5. 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/0yBwwPwrEC7Z0rIssqNsED.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/0yBwwPwrEC7Z0rIssqNsED.
{"copyright_id":"0x5e5945d7a26b9e33944c93bf623393dc18bc6d1472a4afb32b1012bff95a7e0a","isrc":"ES5030200039","name":"El chicharrón es pellejo","registered_at":"2026-06-22T16:09:07Z","spotify_id":"08DoyKjidk5UCTnM7Rq0aq","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5945d7a26b9e33944c93bf623393dc18bc6d1472a4afb32b1012bff95a7e0a. 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/08DoyKjidk5UCTnM7Rq0aq.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/08DoyKjidk5UCTnM7Rq0aq.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5621cd9c89db1f384c6176d35ff06e35836c5a6b4d2727cc685b2f96d73e59e. 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/10pzXTCC5FDvAwHzlE2Dbk.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/10pzXTCC5FDvAwHzlE2Dbk.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf195dc2372ea672e4cee953d3788e6626b17137c063303215a18c5fe0a1a0ca6. 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/2J0JsOqKwOFaVHi8I42xkf.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/2J0JsOqKwOFaVHi8I42xkf.
{"copyright_id":"0x4fb6d58bf849aa005bf49f7ac5aacd265118945de5babaffd7adad44b6c7b7c8","isrc":"ES5030200042","name":"Llora mi pena","registered_at":"2026-06-19T02:11:45Z","spotify_id":"1QbZltH9t94iwW3Ww9x67h","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb6d58bf849aa005bf49f7ac5aacd265118945de5babaffd7adad44b6c7b7c8. 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/1QbZltH9t94iwW3Ww9x67h.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/1QbZltH9t94iwW3Ww9x67h.
{"copyright_id":"0xd9085cee73c0157ac51f63bb84da71d64937d6bac054b9d625ac0dcd940dd97a","isrc":"ES5030200044","name":"Sus ojos se cerraron","registered_at":"2026-06-22T18:31:50Z","spotify_id":"1seddObDzbA8m9j3uQkZkx","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9085cee73c0157ac51f63bb84da71d64937d6bac054b9d625ac0dcd940dd97a. 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/1seddObDzbA8m9j3uQkZkx.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/1seddObDzbA8m9j3uQkZkx.
{"copyright_id":"0x14056f6bdae6470447ca9e29b974c307f6cb5cf7e1f01ba2867d04ab837cdede","isrc":"MXF151300105","name":"Hoy decidí escribir","registered_at":"2026-06-09T08:02:25Z","spotify_id":"5YLa8ecWlZQs8IqZTjTxhJ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14056f6bdae6470447ca9e29b974c307f6cb5cf7e1f01ba2867d04ab837cdede. 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/5YLa8ecWlZQs8IqZTjTxhJ.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/5YLa8ecWlZQs8IqZTjTxhJ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53315691787d7344fc735c28dce4a0da5fb373b7e6cf79d06c5af13604ab0bfc. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6xRsDemE8aH5fTGJoifPee.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/6xRsDemE8aH5fTGJoifPee.
Guillermo Alvarez y su Comoda de Alambres
Le quattro stagioni (The Four Seasons) "Winter"
Conga, bata, y chequere / Me buele la muela