1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217daf1f4d4d3ed161d2935eb8e06fc6b3a14227d584b7dda1079feb3b8f7172. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59858167-88bd-4cd4-afa4-9f7dfa18dffb.json and https://artists.proofprofile.net/proofs/artist/59858167-88bd-4cd4-afa4-9f7dfa18dffb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13df90c40fc0e70be2c211d646b8706f888c37431718540e51631f5a7dd06df0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMBZ92346464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5818e9f85d1e58a30d953c37315b37db93323e507bddf182c4587cee8fc6686. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKE2B2200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4849ea7b4cd5b9dcb8581e8fdb700826aac406ea49012b765cb716cc0d02cb73. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKUM72200497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37049aeee0707b62941d5fc17c19eb29a1bc12e74c5b7fedd24e4c5c98a21d9f. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKE2B2200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a221c2ed3024ce105c9e8ec27b27d19fbe26751d79028251a8712bba3766ac5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKE2B2200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d9d5164d328a7ae93f53da626fd4327de8bc9cb27e5ffe8549cc6ce06991b2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKE2B2200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47d7c99d0b6a9e7fd7c1c87a3dea1554b474cac77bd342db2dc8971981be7d8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKXY12000501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c503524cef28c0469c6cd9797d70be795a8f27e17bcd49d8ec3b0918e0a5c8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKUM72000195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0881163198393b7678c8f8bdf55208384835bd1e3a0264f1aa6c05780e8cdd3a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKUM72000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25108adbc77c81f900a78e7c7cd1c091e44079860f540c5255aabc76b08a4e9e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKUM71900495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f5f2a707999c7d85d2a979e393b6dca367c7870a8360a7cc2897069f90e3ad. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKUM71900644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883d5592cda0a75b6054857194649c247a1152357ffe72f3dce3686067fb48a3. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKUM71900376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fab9fd4dde5168f8bf269f0c8cba2fde5fa2c0ca5897bf665c879798d8f7ac9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKUM71900325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8781cb99980be20669cd270058331c4b337b80a208f4b50c31efd63e089c9406. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKUM71900290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa975e2f34796324ea68e821c5de863f6bc94c76726f2dfb5e04904b5967e26. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKPL1812755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a49b08679070ea6c1f8477d4493c5421142093ab875c460e21f354dddf6966b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P2300996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85e7e2a35de663e1e793f8c909c613e130cec827ecebc4fa70718634d848214. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P2305747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1f773b3c7276c9ea0b07005b99923b2aa24d3897b25ed111045e81c5955843. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P2241210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcb3c49e6cb8b2feeee982f97d1e5b8eaf975165f99f1b38bd68e36d0bef552. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P2305742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7902264adf29bfd176056b37e817c470dcfbbaea90b3dc4cd2ed343021191c04. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P2305746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf373817360c5ca81eddfb8c17263c4e5a931fb5641ef314a51553d767129df4. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P2251009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbfc5ffedf797dfd6618b7b48f95a8b92afdd232fffa7cfb5dcef7ea1c5fb29. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P2305743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2b02d8e77e1b7c5fea0c90852f0f2c8a36340ca5d7ed2d717eecab519e2373. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P2305745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8612d5f0bd0ad4b3e8d1c6ed8df6c7c86c701cbe1116253cd9161588313935. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P2243160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedafc58c74f7292607a649a25145856757c87151f04cd5be589b5aea908b743. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P2305744.