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 0x83b6dad2142b6ed1dad1f67ea38867b9b5656e0140ec8ec11bbde4c0df758c46. 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/8059fc5c-b044-413d-a13d-acdf5ca0796f.json and https://artists.proofprofile.net/proofs/artist/8059fc5c-b044-413d-a13d-acdf5ca0796f.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 0x6e7fdbe46a79d4aa4acb0902f98f58678324f0f8f03a67a7a7e334adfb56eb0a. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QZW9K2282568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db3f080afa06a7b2d108798ce8874f8bb488f2e40800a0331b90146a326919c. 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/BKHYP2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b840b30b01d1f719040f5c2f37b6e67843057df8acbf00e90634d079f1563e5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BKHYP2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170cfa974b5331fe38e48f223bb778e1c694f48c86d33781a115cdaa4f90605e. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/BKHYP2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71df5da762edfaba0905dcaf459920cd560e0d7c7184643fa4e276085d63c6bd. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/BKHYP2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994525f949e548a8e9ade5f45e7655d75ebf34f15ccf5c0ed19ad86af3fbb57b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BR8LU2300151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2522c5dfb6ccc1e134a339017388a12598600ff002fc8afc652f5b11d528911. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/BR8LU2300148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0e71d883411026af61a30ab106b44438c02f2f3266078f0cffbb1dec34ce11. 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/BR8LU2300152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0e71d883411026af61a30ab106b44438c02f2f3266078f0cffbb1dec34ce11. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/BR8LU2300152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08038f049518ddfa0d9800e5eeb183e1c87897d9a35d759caa13fadaf987ef6a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BR8LU2300149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2c0104b788d008a7df3657f93abf7459c2e97c75ff36ff517145790eff67ba. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BR8LU2300147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ce143df168588008e88f01b5945be536051f3efecded58ab69d3e421030f9b. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/BR8LU2300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c12bb551f444c42c74471c9dec869661e22adfd594f2a401ff36c4df9fb47bd. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/BR8LU2400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e755bb96b3d65e28aa33d66501a7bf1708dd64dde939f0a6b591b3bfb10dc2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/BR8LU2500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c01064449d633a880c24fb1f212808ccdf49b8a2bd852b689e7a3444746e1ca. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BX12K2200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c01064449d633a880c24fb1f212808ccdf49b8a2bd852b689e7a3444746e1ca. 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/BX12K2200029.