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 0x4d0d6ae87c840fb4ecbf9eee3520483505c3fbd38acaa9fa3b70a69eccee865e. 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/bbbf161e-1b60-4718-b2b3-a3c5277dd1cb.json and https://artists.proofprofile.net/proofs/artist/bbbf161e-1b60-4718-b2b3-a3c5277dd1cb.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 0x421e8a520321b753a7ed4b8c088699658586b4daeb681f7a1533830912c2f87c. 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/0Cot8hd7mqzRBe1u4BVTCM.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/0Cot8hd7mqzRBe1u4BVTCM.
{"copyright_id":"0x9e75e0e50f23f61518edf2291a41d0edfe29a38f41ea24d4c58a738ddce47776","isrc":"SEYTP1505002","name":"Let Me Sleep","registered_at":"2026-06-25T18:28:07Z","spotify_id":"36RSHkdIUcohkiCC3tYbPn","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e75e0e50f23f61518edf2291a41d0edfe29a38f41ea24d4c58a738ddce47776. 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/36RSHkdIUcohkiCC3tYbPn.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/36RSHkdIUcohkiCC3tYbPn.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6293b19f4661b37e7848cfc293d40a7aab1f9d69ac22ff2061b10812c6013dcf. 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/21iQuXGBpUB5bQbRkz2Wud.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/21iQuXGBpUB5bQbRkz2Wud.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b63ba6fe440ce1de765ac4ef7b5830a90ccf966b575de315c7b89386c48470. 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/2yGNA0P1t951r8aSGDaPTJ.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/2yGNA0P1t951r8aSGDaPTJ.
{"copyright_id":"0x43fa1f7acfbbefb146649ce82ae03f08995f07293a93fdddd3be4b8b223cad58","isrc":"SEYTP1505005","name":"Blue Notebook","registered_at":"2026-06-05T12:10:36Z","spotify_id":"6hWYl0NdPgNAOoreAvcqJ5","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43fa1f7acfbbefb146649ce82ae03f08995f07293a93fdddd3be4b8b223cad58. 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/6hWYl0NdPgNAOoreAvcqJ5.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/6hWYl0NdPgNAOoreAvcqJ5.
{"copyright_id":"0xe2c6fddd6b2d156cebf645abb8ddd50e041a19a83e6f7d32dc6489133a9eafe5","isrc":"SEYTP1505006","name":"Film Credits (Arr. For String Quartet)","registered_at":"2026-06-25T18:27:06Z","spotify_id":"24gIBICKJejWwyQefeToJf","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c6fddd6b2d156cebf645abb8ddd50e041a19a83e6f7d32dc6489133a9eafe5. 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/24gIBICKJejWwyQefeToJf.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/24gIBICKJejWwyQefeToJf.
{"copyright_id":"0xc9089826cc73f4a00d57ef16ed4cb6eeb3c4a6578fe6abcccde42c37da9b03a7","isrc":"SEYTP1505008","name":"Mother's Theme","registered_at":"2026-06-17T07:37:44Z","spotify_id":"1vpIyQZuOWVubqnGtU7lYC","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9089826cc73f4a00d57ef16ed4cb6eeb3c4a6578fe6abcccde42c37da9b03a7. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T20:41:44Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1vpIyQZuOWVubqnGtU7lYC.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/1vpIyQZuOWVubqnGtU7lYC.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee83a1691492ff7a002072148bb0f2f7edd7256825d78a82a7624c077475984. 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/20bUqFnlGC9SSjYHqo80N9.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/20bUqFnlGC9SSjYHqo80N9.