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 0x28ee5961f127942d791907d87e3b786da49ad6eb93b4afe611691eb1fa3d28d0. 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/dae7ec48-46d6-4d34-8159-ae5b8cc07459.json and https://artists.proofprofile.net/proofs/artist/dae7ec48-46d6-4d34-8159-ae5b8cc07459.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 0x1502ed44cd3656e595344c4080b07e6c24b5048c384c6961ef9d1a43992eb904. 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/ITG231100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1213ed21f16713e3128b190d213edb8117bdb805605c1b675102d8d1e27075b3. 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/ITG231100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05206dc08a24312e1d5978d219d650dc7e02e28385bd21377ea511ebf3a46d66. 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/ITG231100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e196e999a391e73fa45c7719112fffa045a8958cff7595eb25937bf26170fd. 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/ITG231100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb354ce8a2c08793ac79db74a4cae87ff3d2d330e78856f84f4e272047f69e8e8. 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/ITG231100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f519f4d8f8d58edf34c65b3c012307036eb96cc90a5442c1763b0f2c00f7ca. 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/ITG231100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2052e000161b66dc35289da4ecaf07dc98cbc73d17937c9fbed30c463a8152. 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/ITG231100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1edbfaf0ec223fd7436caa9938d2eb07a9f27794cb5329fe62f717f642e19a. 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/ITG231100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c92b15f419ca267551e1258d007ac3085d83cb4066b3a6b1d019168b7c5b542. 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/ITG231100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81adc673469ae179f53b28983d2813d2a1d4439bacb81c828fa9a94581dcc4b. 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/ITG231100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32f0bd5d91a20f3252c85b876ce10e086c0ee3e8b3e709850c0a9ece291d60c. 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/ITG231100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49683bdcf8fc5b0f64fa41f4ec7f35a803ebbac93e8353d6432c68986db3a562. 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/ITG231100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2c167e8d8ba5e128bf5a6f72af9f38e6dade2f9eb5b833bce4976e120f2994. 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/ITG231100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc419ea182b618fde51b20c8aeb72ef31aa3724f56af87aeaea1b3c228fb38333. 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/ITG231100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508e7b157e6c93eaaf7d9ff2998cd006023ba10cc90b932ca52e90110cd5e1a9. 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/ITG231100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ec23e63083bfcc7ba48987e9d43672d87fe6573ad29197616a1f670b8a4da1. 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/ITG231100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd967c9fdc4c2330da756d1d8582ed5695400ad1d3e7f1b2cb6d14cba6ff2b1. 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/ITG231100021.