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 0x44532cd73bccfc49a6e6bbc1fa488cc9026a51cafea90d7876c9bd9fd6379961. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/506897ce-8441-4d4d-8bb2-5e20bc8f88b5.json and https://artists.proofprofile.net/proofs/artist/506897ce-8441-4d4d-8bb2-5e20bc8f88b5.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 0x9a366598ee95634042180e6ba76751700d969c8fe62341f6ba9e79f6dabf91db. 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/7c1RwfIXVzd4XWZhevWMzJ.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/7c1RwfIXVzd4XWZhevWMzJ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe220b9385527a1507dbdf2b9231b419de63dd9f8d4147baf7cd14d37b34498d1. 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/7taaKgsFQc70wPkcf7F4BS.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/7taaKgsFQc70wPkcf7F4BS.
{"copyright_id":"0xcf5680e37dda94f0fbbee52e3ea13e7d599d27f8379c35cabf258eb8daf4f6ea","isrc":"FR6F32302460","name":"Africain de France","registered_at":"2026-06-29T06:14:58Z","spotify_id":"4v2OAbUMYonUWsbXm42rdI","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5680e37dda94f0fbbee52e3ea13e7d599d27f8379c35cabf258eb8daf4f6ea. 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/4v2OAbUMYonUWsbXm42rdI.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/4v2OAbUMYonUWsbXm42rdI.
{"copyright_id":"0xe1149b8cde968a4ff278556ea62c797d0d7fa78b218221809abea40e59940a9e","isrc":"FRUM71800332","name":"La même tribu - Version 2","registered_at":"2026-06-04T08:40:25Z","spotify_id":"4zOq5CQ2PohoAaGPiBrOr8","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1149b8cde968a4ff278556ea62c797d0d7fa78b218221809abea40e59940a9e. 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/4zOq5CQ2PohoAaGPiBrOr8.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/4zOq5CQ2PohoAaGPiBrOr8.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebf27cab119153eb3d018b740e182d8f2ab877e8f4e83bd87910093a367770e. 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/0dmeHRWn9YL7yzWWLX17c7.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/0dmeHRWn9YL7yzWWLX17c7.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ad0f20703ea0d40593f5fe0a330c7c4a66840fa14249c72ef9b32b40ba9367. 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/2IVCSe0Qn80f3XMQ9bPQ8Y.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/2IVCSe0Qn80f3XMQ9bPQ8Y.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebf27cab119153eb3d018b740e182d8f2ab877e8f4e83bd87910093a367770e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/39yUGbqDcOBNCE2G1vwx5u.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/39yUGbqDcOBNCE2G1vwx5u.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7c26b248de963354b3266c46cfb1a8763cd2a287b1bf9a0916a81326ba82eb. 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/4fbDtvodHWJ9pg1Sv2FdMN.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/4fbDtvodHWJ9pg1Sv2FdMN.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe220b9385527a1507dbdf2b9231b419de63dd9f8d4147baf7cd14d37b34498d1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5WLINdBQbx0AiFJqY5idTu.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/5WLINdBQbx0AiFJqY5idTu.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7c26b248de963354b3266c46cfb1a8763cd2a287b1bf9a0916a81326ba82eb. 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/2StdXqQ1Ya30IwgmpTPiET.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/2StdXqQ1Ya30IwgmpTPiET.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebf27cab119153eb3d018b740e182d8f2ab877e8f4e83bd87910093a367770e. 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/2U9opl1KnoNlgmuW2Xba7g.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/2U9opl1KnoNlgmuW2Xba7g.