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 0xd663a017bb9a2ef577635c1961f1a8dc317b0c6e10efda3f4cfb459c24bda9d1. 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/f58fba2b-aa9d-47c9-8174-7c883702cfa7.json and https://artists.proofprofile.net/proofs/artist/f58fba2b-aa9d-47c9-8174-7c883702cfa7.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 0xfb0f3ed845a8619408eca47819040b2878be0ec7e9debe0d1799ad028ce0ff55. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPR502206850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbe49ba45c641a5c3056ad42e240e83440309de6417d622db76b4aeecf06146. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:10:01Z), 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/JPA652206144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41cb94b6303ad9c8e2b56972dcdb89af381f1d84814dc769fe366743b688462f. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/JPA652206145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3f8a0815d6ea250b26a366f73bd052a216a59846ef7cb4a8aa0a639931c6db. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/JPA652306392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e00a25ded8078b5e787462adcc6619e417fb76cee325fb4445b3cf2c5668b6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPA652306391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa590f5cb698743fc0cfe646e312a816afe037169d7f04193de233c3bf49033c9. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/JPA652306508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e00a25ded8078b5e787462adcc6619e417fb76cee325fb4445b3cf2c5668b6. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/JPA652306391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc149143c66fc5f475eacaf96881295c819c7437417d3dfef2682e67521bf8965. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/JPA652306243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d15fef4de354db0d132b13849af82ebd293948b9cb6714235dfc3ae8ff96b2c. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/JP92U2400252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cf0aee995c084a7c1a2dcfc167ec9e7c09cd302c1884ffbdbbfcaba9a6933c. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/JP92U2400253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa590f5cb698743fc0cfe646e312a816afe037169d7f04193de233c3bf49033c9. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:11:06Z), 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/JPA652306508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbe49ba45c641a5c3056ad42e240e83440309de6417d622db76b4aeecf06146. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPA652206144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09099066397a6405e813dafbc8da150793681fcf92089193589c07be04e50a1b. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/JPA652309720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ac9e247f898c11243173aeced0e3290ae07b8cec97ad0b314e24eaabccb9f0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JP92U2400560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fe685087af8133cccbdb6828efed39005943db18c780cbf0f7fa74cfc6a400. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCJPI2544347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159b11095838bec33f11615a82b095a13ba75b16ab7cfc670689f2dd78c1401d. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/TCJPI2544354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ccbae42756d68c2b96eb6c75c2f88c9c50254a7deaebae93e9a451286a6184. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/TCJPI2544398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408033ea90bb1de0c92a5b1e9a743782863597b43a39222d9eba7cebae496f72. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QT66K2558479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace8ade2ea04995a1adfc092eaf440ef09201e9e1a62b738a91cbb63b13618a7. 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/JP92Q2302062.