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 0x7a5f1daa11ca72d6b15273edc13a09e2757cf7edc9924dfcedd24fbb55fda5b7. 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/d5aab900-6423-4c92-b0ed-cbc6b6c1d7c7.json and https://artists.proofprofile.net/proofs/artist/d5aab900-6423-4c92-b0ed-cbc6b6c1d7c7.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 0xcc9820907190252dee3c2b94b737593575ee3c57535528d0ecd80c0d1c63b10d. 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/QZGLM2229259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c76d8964b79c6596db3e6ad3a509a9d7f86349d8a8b6da7123dcba2c8c3d909. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZGLM2229254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38c9be2b64f4f8514d0cea0ec200bedccd4254152fddf03178347ad57eda883. 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/QZGLM2229252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe069fa86d22be674e5a1b3b5fde4dd40c9f2b090c669fd4c64ace3fc8a7d9dc. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZNJY2491839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60596822e2dd3bd16cbb002212f51bbccb595e644c4b01f15b742c0e4c5126a4. 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/QZTVM2160656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf45ff1018c61be884eab83fbc4da148625d64b05874ed5dab8ee744399ed260. 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/QZNJY2130978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4527534d6483b220dccfb43b73a9c9d62759a63fa493cc5e4bf36e706d472196. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UK43Q2011056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75d6a5bc27192e16c0df7d2c270f48e9891d77dbae1f1c5daf2cd3d0642b402. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UK43Q2114178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd07e68cb343b5531751951bbb2fb3c06e0df864e1be667320457161cd6b4956. 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/USA2P2476557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0152b81ca54ba29dcbfd0ab401ce8db334672a3718bf1c8d46ace7e3442b3ad2. 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/USA2P2476558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c8952393c1452c6966769e19065702c88fd38e7c9222d0358ddf86aa998404. 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/USA2P2475186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3192d32bb0b3b954803bd663380463c3972995e14bd6132f0e0b63882a9bf5f5. 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/USA2P2476559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79092250d1725156739f102dba60209cc2d74fa1cb6c05c9d827805095061107. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA2P2476560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ee82898fe57c1669a14894ffb1c10182691b8d8e740c7bde07c96a2281ea64. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P2476562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcae006df9ad8e1e27dbafb4852e786660a9afca0c00f8bea25fc3c124e8e80. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P2476563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3971eb4e2da326cdb9b3648a5facb571e424524f5c967b115162f7b86e0d6515. 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/USA2P2476564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d8c7b653fab9664c724406d4088b10f6b73744db4ab87ac5ae2a65f6e41860. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US7VG2390109.