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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc039630eee1d1fb2e38e24075badfa67d76fd98c2487ecb68c82217b496f8a97. 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/246fe30b-43c4-4de4-8a88-0d98c507e678.json and https://artists.proofprofile.net/proofs/artist/246fe30b-43c4-4de4-8a88-0d98c507e678.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae807164ae2941f79f598b48fdae40f74342c5a1f95ecd33044fddd5a48e3ec. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRIMU1700354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a9fd5fb6d82e8e9245f1171b883dff0657fb8b22e08dcda7938c7cbd5801c0. 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/BRIMU1701081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb70edd733b904828a15a539583e91491a716eb736f5993878d67114ce6241a1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/BRTUK2200794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3166d65b8285e61b951c8e912493a67b2546478dc5098fdf86b3ef10aec7fb. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/BKTHN2400141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42de06a93b4590f5f72b7664e70ae7c82e12c5fe1134ee817271c56d2881eb20. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/BKTHN2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d5a4b687188edd9146b67f8ba1f2a4f0617c79696b2b61c3f5a861b3afeccf. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/BXXB62500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d8ee869d3467ded71d07f6ceb82c9528fbdad48ddd9187c9c083f2169cc8a9. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:02:47Z), 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/BXXB62500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71452e734f1644c60136d6eac667fa919b493531514b53b0ae4e1908255def1d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BXXB62500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bc30b6986d94e44f9c5db2b0671c35638f0f9c2c2477a88787f410b1754d65. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BXXB62500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6eb9df7501dedfe69f815e80d34bd2dbd6ce78128149d9e388e88a67b710583. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/BXXB62500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a39741dd9f6ae22512c37ab3dda4d1ca76cfa53fbeacd1e7550b3940c5afe12. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/BXXB62500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32572b19a02a7c6f6ed0de1b427d9d95bdbad41c72bd5a7d15886b9755225c4c. 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/BXARK1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d48e7bcfcf00b10b5a0a8bcb6bfba7883db6acdf764306ae535e4f81eb58bd3. 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/BXARK1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97cdaa1694f88b549e71221e9fe0b9809f032d1911e24df709021436ad9d75e1. 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/BXARK1600004.