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 0x4298088fd35472968e05cf41ec6a92045d35ae3dbd8deb7ef20c42488ba906da. 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/14bce696-3a8b-4787-9ae0-931ca363c0c1.json and https://artists.proofprofile.net/proofs/artist/14bce696-3a8b-4787-9ae0-931ca363c0c1.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 0xd69605a3d6f48a0f4352774354f84fc3bd43171a9551e6a5633d3b244e7c5711. 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/MXF152300241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e56c58a2e12a0a52058501754db039485f15bf5d5b6c2b54276cdfa33b50062. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/MXF152300706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513ec5a81d972fd4ee1a92c7668becccd699945800799a0b04984bc4714f8e10. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/MXF152300672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c402d0a97c3d1acf1f116c9e00a0b4ea7f74f27f428f5994633d689a4f1a341. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/MXF152300707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf365d7ad5e7f67d7f4b5e5bb7b580b010439294deec4c77cd9fe6f3f55e9028a. 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/MXF152300709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f9f0e1eff1e6bf9b4afa0cdbf0c1f5f0fa19d7237eaae1261c83ee530944c9. 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/SE6HN2479939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49bdf223698d5c5ecf77f0d2f65f65a1afc2475bfd6a2e899bdb9fd3f0de0a9. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/SE6HN2424462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7d69d4d6a69667c53cd5ac96a45426d71f0e14d761b9a9dfce4ccf0415d2aa. 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/SE5752437052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf390d55fffeaf43d92eb54e34d658a103fc19d7257c986a7d09ea5890a22534. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZWFF2373116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801da84400a8b749a778d90ed9decc2fa35df31136d34c6540ac42ec50060685. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/TCAGZ2358290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69605a3d6f48a0f4352774354f84fc3bd43171a9551e6a5633d3b244e7c5711. 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/MXF152300241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ad12119e63257d99df6205aba92401c38482da379ebb846dd4bb0480756210. 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/QZNWW2241385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f5f252694ac26e0160f61cebf65a45189984410e607ba1cc18f2d6a5a514fd. 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/QZNJV2209276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88aa8c0d826344333868b777f57c1d89399e1e27005d29ab924881e87829a5df. 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/QZQAY2233641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a14ffb485fcfad4be42a9596a498a59a5a37595367c964d3c31369f6d901f14. 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/QZPLR2158037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d68e1f281b71006e46006d5990acfab144dd5dd6409436936a01254a3d43637. 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/QMFMF2102016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6da4b75e5f1314358bc702e81c15356a474557549e39f05b6b2d878c9165f21. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/GBRKQ2104875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d50f0288fc1c6069322b9685ac63153dcbe18e742e178d49fbe42f22b5e8b1b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USLZJ2151161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722603d725b39b02cfb2233002a77ffd1f9f28dd37c99f7dfa124d444f646116. 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/USLZJ2121001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7eb814424a0149219c18d2b99b9aa4e901d3f496526cda607f9b40e08f1e5f7. 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/USLZJ2112365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c177ffe4cfd907621720e9d8f9627cf1df12f44633857bf0154eba6fb787f3. 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/GBWUL1909664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcab830675fa052703468c47f0ea0abccd37c3888eb447ee07cc217058e9b41a. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USLZJ1978496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d158111401f92a0d707421c3f1794e6ff30c8fde9261e9e8ffe801b441574a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USLZJ1979203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64230bf9bf820b7d9f895c15a0f9c7a652ef76b5cfa06b16e1972909b47b0915. 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/USUM71915920.