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 0x0577be3167ec0d7ce8393ee9a0ed3eefe626a6c63be396842840451b317ba3ae. 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/18eb8ffd-dc0b-414a-b388-11aa7c6d62a3.json and https://artists.proofprofile.net/proofs/artist/18eb8ffd-dc0b-414a-b388-11aa7c6d62a3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0xd6d4e0edab859933625d4559d4bf43217191b523d44980c7a531d3bbba8d98bf","isrc":"USRC12203868","name":"Unstoppable - Slowed & Reverb","registered_at":"2026-06-04T13:25:28Z","spotify_id":"6UvgVaHDtycFqUM1LPxhxu","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 0xd6d4e0edab859933625d4559d4bf43217191b523d44980c7a531d3bbba8d98bf. 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/6UvgVaHDtycFqUM1LPxhxu.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/6UvgVaHDtycFqUM1LPxhxu.
{"copyright_id":"0xe5a8eb22d43126addf5a485b8e2343acacdfe289c478816394e0c42904e1666e","isrc":"USJI12100071","name":"Sure Thing - slowed + reverb","registered_at":"2026-06-04T09:19:08Z","spotify_id":"5ai3UwdgwPp9wGcHY1zAk1","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a8eb22d43126addf5a485b8e2343acacdfe289c478816394e0c42904e1666e. 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/5ai3UwdgwPp9wGcHY1zAk1.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/5ai3UwdgwPp9wGcHY1zAk1.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c197f746b8439ed2c97fcf51e13de4145e5260036874f491c7a437261cb4ea. 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/7oxQ94NFQ8jA2xHxSvApb5.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/7oxQ94NFQ8jA2xHxSvApb5.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c197f746b8439ed2c97fcf51e13de4145e5260036874f491c7a437261cb4ea. 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/4ozWE7WGTSYho9YYavFEhG.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/4ozWE7WGTSYho9YYavFEhG.
{"copyright_id":"0xd6d4e0edab859933625d4559d4bf43217191b523d44980c7a531d3bbba8d98bf","isrc":"USRC12203868","name":"Unstoppable - Slowed & Reverb","registered_at":"2026-06-04T13:25:28Z","spotify_id":"05RZEZeFW7PZZJABaAhY5i","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d4e0edab859933625d4559d4bf43217191b523d44980c7a531d3bbba8d98bf. 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/05RZEZeFW7PZZJABaAhY5i.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/05RZEZeFW7PZZJABaAhY5i.
{"copyright_id":"0x75efe6d785adbe6e1cbee0731dbfe358713e05eca8fcddeb4a5e4dded9f811be","isrc":"USSM12109759","name":"If By Chance - slowed + reverb","registered_at":"2026-06-22T19:21:35Z","spotify_id":"1f72uIRFmTRZ3p6bPXZgOf","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75efe6d785adbe6e1cbee0731dbfe358713e05eca8fcddeb4a5e4dded9f811be. 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/1f72uIRFmTRZ3p6bPXZgOf.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/1f72uIRFmTRZ3p6bPXZgOf.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd62e240a8d8ac31c00720e70777251706581b6106b64450425b28355f3fd55. 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/5Ev2z8XaPirE0WzDwvcWEe.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/5Ev2z8XaPirE0WzDwvcWEe.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd62e240a8d8ac31c00720e70777251706581b6106b64450425b28355f3fd55. 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/43U065p1E8ApwvG509eAw7.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/43U065p1E8ApwvG509eAw7.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd62e240a8d8ac31c00720e70777251706581b6106b64450425b28355f3fd55. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1INM89dD7Qa2ydTsNpCluH.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/1INM89dD7Qa2ydTsNpCluH.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd62e240a8d8ac31c00720e70777251706581b6106b64450425b28355f3fd55. 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/5WFzRPW4uURHlhf3HeOmMR.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/5WFzRPW4uURHlhf3HeOmMR.