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 0x9c5c83e375172705fa27917f73ce2b338329900d7811dd8d1d7892a379c62dfa. 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/98b02447-3de3-4075-8824-6f913d3af454.json and https://artists.proofprofile.net/proofs/artist/98b02447-3de3-4075-8824-6f913d3af454.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 0x9af578da605be4b38410670396d040c8b9d3fe640ea11694b8f80fccc95519e1. 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/1Iy4dJWborISHY9FHWGKPD.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/1Iy4dJWborISHY9FHWGKPD.
{"copyright_id":"0x20b5af22f742f5b14d61e5d886fcb372a45c79e66d06bf08624c9d245a89a5f3","isrc":"ZZOPM2223265","name":"Laberinto - Bosq Remix","registered_at":"2026-06-04T13:24:12Z","spotify_id":"73EADOHLCpA5Fk4EM8vzO1","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b5af22f742f5b14d61e5d886fcb372a45c79e66d06bf08624c9d245a89a5f3. 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/73EADOHLCpA5Fk4EM8vzO1.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/73EADOHLCpA5Fk4EM8vzO1.
{"copyright_id":"0x5b662445ddd0d3f4184e53c31e10a5467fca92a4a2011902ff4258471ef3621e","isrc":"QZ5AB1833254","name":"Sin Ti (feat. La Vida Bohème)","registered_at":"2026-06-01T14:00:58Z","spotify_id":"6vLZeNQlHhvJyiUBEzlUQB","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b662445ddd0d3f4184e53c31e10a5467fca92a4a2011902ff4258471ef3621e. 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/6vLZeNQlHhvJyiUBEzlUQB.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/6vLZeNQlHhvJyiUBEzlUQB.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46646d4b39f8a8a1723208919481cf7349822cb17c4355e9c2a6546620d0f59. 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/0c3nFVkxeaIQpPza9ZNich.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/0c3nFVkxeaIQpPza9ZNich.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021132b2b5755be9ae8e8f36657c2002e87e2bb654a4e021adffa14c4a78d8c1. 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/05ayzVXVRd5JBtCkQiMFJY.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/05ayzVXVRd5JBtCkQiMFJY.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46646d4b39f8a8a1723208919481cf7349822cb17c4355e9c2a6546620d0f59. 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/0lRdpv1I5Q46I1pzFtQYId.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/0lRdpv1I5Q46I1pzFtQYId.
{"copyright_id":"0x63d6234a1ffebe1fa0dbd560348a3b1b9f70381aa73ff692ef3bc8cbd8ca077b","isrc":"BK4DA2315066","name":"Besos Ricos","registered_at":"2026-06-01T19:51:42Z","spotify_id":"1AeVenKA9w42gepptaabsD","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d6234a1ffebe1fa0dbd560348a3b1b9f70381aa73ff692ef3bc8cbd8ca077b. 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/1AeVenKA9w42gepptaabsD.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/1AeVenKA9w42gepptaabsD.
{"copyright_id":"0x9feb3903ec16b8b095c8d7ba497a58fbc4951c9e90b0b2fe4683ee10f1ac047d","isrc":"QZHZ52094109","name":"#Sádico - Sunsplash & Ferraz Remix","registered_at":"2026-06-07T15:41:09Z","spotify_id":"6biNxZAZzW1qmWZu78ao5C","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9feb3903ec16b8b095c8d7ba497a58fbc4951c9e90b0b2fe4683ee10f1ac047d. 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/6biNxZAZzW1qmWZu78ao5C.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/6biNxZAZzW1qmWZu78ao5C.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a90a5be0bb3edf4c362535cd9da260720ed49e129c073e72ff7c499356128a. 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/2Sp2BWQePC9v5FXctl7ZOT.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/2Sp2BWQePC9v5FXctl7ZOT.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3447d50969677ce5a7c4e68fe19e0b9f249f8aafb70885372936f8828e574e7a. 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/0QVYuaKjODxjiOfO1jT0WO.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/0QVYuaKjODxjiOfO1jT0WO.
{"copyright_id":"0x0a14cf7aa851eeeabbaad74ec869f46b49b0d66ed68fa42b7ab3b189378b56c8","isrc":"QZHZ62015765","name":"#Sádico - Miguelle & Tons Remix","registered_at":"2026-06-19T17:49:07Z","spotify_id":"5WBS7fvCpmqxISi0zPEvDy","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a14cf7aa851eeeabbaad74ec869f46b49b0d66ed68fa42b7ab3b189378b56c8. 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/5WBS7fvCpmqxISi0zPEvDy.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/5WBS7fvCpmqxISi0zPEvDy.
#Sádico - Diego Terán & Lou Flores Remix
{"copyright_id":"0x39275c48ae09f4dd1a6c3b1f5e2a1c24d85fc7bc86b3facd659c623c2e497410","isrc":"QZHZ62015864","name":"#Sádico - Diego Terán & Lou Flores Remix","registered_at":"2026-06-27T16:50:20Z","spotify_id":"2ISxiOg2bRmEqOXBYA1D7U","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39275c48ae09f4dd1a6c3b1f5e2a1c24d85fc7bc86b3facd659c623c2e497410. 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/2ISxiOg2bRmEqOXBYA1D7U.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/2ISxiOg2bRmEqOXBYA1D7U.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73e03e26c6f57e9d9376092c0660b7a3f642e8c9388b6152ad7e8d4014e7c3a. 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/4foPh6dRgeZrrbCAC255p5.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/4foPh6dRgeZrrbCAC255p5.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cbcbbf0bc1f8239c74acfad7cf443964da382a6f5ab1c727bf12d5091986b3. 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/6S7MMCxzavFIbqXEleji7X.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/6S7MMCxzavFIbqXEleji7X.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a824e71e6a6d7c4b4ab5e93f25601e49732874b90803446d32090dec896468. 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/4I1qopX9knBHznBLKZpAUi.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/4I1qopX9knBHznBLKZpAUi.
{"copyright_id":"0x9fa5dfc3d624553be70b2f738839fda640a22f53c5bc0fff3b5f9f24d0063a72","isrc":"BK4DA2306059","name":"Dame Un Break","registered_at":"2026-06-01T11:15:55Z","spotify_id":"64CxbY7HD7nOtmfoaiWYMT","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa5dfc3d624553be70b2f738839fda640a22f53c5bc0fff3b5f9f24d0063a72. 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/64CxbY7HD7nOtmfoaiWYMT.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/64CxbY7HD7nOtmfoaiWYMT.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af578da605be4b38410670396d040c8b9d3fe640ea11694b8f80fccc95519e1. 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/0P0BTqkBQuAlzbwbTEV57m.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/0P0BTqkBQuAlzbwbTEV57m.