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 0x100caf07716738bab108a9c32d8a6b9298a3eeae714186b82b00a22bc3405019. 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/9f3417da-0847-4704-90be-2fa27d46a652.json and https://artists.proofprofile.net/proofs/artist/9f3417da-0847-4704-90be-2fa27d46a652.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 0x5a7de011ea8263672a7fbd79d6371187d5fd6ea14eeb5f1d2a250cc0caea63d2. 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/CH7812193340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8081be8b4d435c6aa88b79663f012b8bb9391aa52c54d366292177fdc883885. 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/CH7812194312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da8e5e7423a8397b7ce1ae4f25ca492e8d6a552988fe4294759fcf3d428045e. 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/CH7812195338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5c66445ca27fe26a468324e8078a2cac9d8b462573c17e9d1282db8289a51e. 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/DEA622300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020f630bf63633c2de146eeb94792c39c1aa3a3248d20224607941eda7b8a1e4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:55:55Z), 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/DEA622201233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd114fcabcaaf71d8d7b3b9c5ca443167717d9c2c25dbd82400c5a88a9c7c2a69. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEA622200625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d964bc2a04916c2e2aa25e87ac41366391a53ff85d29e697c106e8fbef7a7a. 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/QZSYP2230965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345fc51a188280ef760496a863ba1f6d2cf1fd50f80312b1fa6e98fae04f1abc. 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/QZTAZ2259253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459a697727a5a56938eb189595733b42105ab01c338aba466caecc461bdde7ed. 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/DEXW62100163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aaff0c221526814e5aba1bd1c73e4c21116a4b1eab65fff1ab48ed4eb02b97d. 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/DEA622001016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cce78685108b89e405607d002fabcc7a9f6c465524d2789bce5bedec81eb415. 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/NLT2H2000091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79e20a1288dd6499983cb549fdc937584797b6bbe25a5a0837491747d6ec26e. 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/NL1AP2032755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8821b8c8d82642f67cb3a9f5fef6c6df805db7ce14f5cb4268047f4f86bbd0b. 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/GX38U2105377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85934d9edee22dca44c98cad707cee337efca4de6504815119ea3aa500eb1f97. 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/DEAX11900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a8230719d321c9f9c1de23fe83633b65205683092670acf0963622bf6b3091. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLT2H2000177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4c9fbd16b61ae889096e18596edcc605f3c1de16096373d08ca314d579adf1. 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/QM7282025674.