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 0x8b503a338f152dce40069e7eb3f8018e99c8427f42dd68cc8c8f601b7417a425. 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/9a8a1583-652c-49a9-827c-9ffc0136e444.json and https://artists.proofprofile.net/proofs/artist/9a8a1583-652c-49a9-827c-9ffc0136e444.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 0x07d0b17633ca2ce839bbba6c2f268ec9321cbe1fa59c7a4880193afa307f80b9. 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/DETO42199650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4119257e98f8b34860b0f41488ac47b353fc0112faf1d78bac94ef8e97afffa3. 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/DETO41931050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce0609ba9dc044776e9bf5f6ee192ba9fca04b5826025de82ee9f62c6bf639e. 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/DETO41971305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4e237af5e452a730d6ab1dccfe2371add9e15d201a9012fce5401f4040c5f2. 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/DETO41855960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e182f9a1b1a7aa4cba06452189049fa9ce7d0f6089edb9e6efe382594c8b499. 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/DETO41775191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8390894c23636af838a35bc7c9d39c37c6cfcc9fcd89df12ad1f7356c8b8e5. 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/DETO41639149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee36f6045e70809a39179cf7427b6a0a0236e864e89cb8089b91adf0ba19fb1e. 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/DETO41600456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c5791d117ae177508ea7e5a35b96a9e0637c14ebcd7cedf3ff0808b087012b. 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/DETO41529460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb46bbdb0b9ee1bd1bf1b66892c5dd4c6f2376f8ee73ad10dc7e0c54c85d8a64. 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/DETO41445839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7a07a825a1ecb9652fb9316248702747ac937fb86f9d2d11332e04c029adc5. 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/DETO42445078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757b70478c4c9ef597180d9aa80147bc6719eaa6ee25f9e7640b56266fe396f6. 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/DETO42375629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff1f2eec6b2126e4a7dc919d2df237fe7acbc783b3320bf443afaa5356fac0b. 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/DETO42224567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419a39b3e11b5e5f74435b9635e675ef651e1a9bc30bcee5487802836a3fc2d1. 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/DETO42214429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb46bbdb0b9ee1bd1bf1b66892c5dd4c6f2376f8ee73ad10dc7e0c54c85d8a64. 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/DETO41445839.