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 0x0b00d0d78aaf0015ecf42c2a6f2163d52d6797d8b3b970fa42a820a25b77226f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e5ac2c6-fa80-4ba9-862e-be153de10cae.json and https://artists.proofprofile.net/proofs/artist/2e5ac2c6-fa80-4ba9-862e-be153de10cae.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 0x96c52a2b714c56137f5f666a38d4915a4655cb5e6c3bb31b1aefce3206390dad. 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/TCADG1736857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b704433d4e850a1bb18f52fcc1d9b7fa5edb8772b3028b8fa1bacea0f1cd496. 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/TCADG1736859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec001918e05919e1f2b5dd151ebcc8ff6a041ac8b496bf02e25c7c0f7df065b. 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/TCADG1736862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf485dc03ad2b6b502d38cca2df7e84f9cd6d417da738268180c848c15a9e0f18. 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/TCADG1736863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb107f32db6f8bd3beb7a1ec67029836b8795bbf05b226edefd7fc798f80271c. 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/TCADG1736864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc80f76290fc338c399a9a5bd5d03f35f7d5a92daeebccdb6dc7dee74641a0c. 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/TCADG1736865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77aced7e665964dbcd7923cfc420147920f36c6e28ccf6f4116a2fd81417fada. 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/TCADG1736866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cce03b5e00293c23b70e8ec0398ff2e3057d51c416db0720d1d1f174655d44. 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/TCADG1736867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ac4dfdc16fcc99b902bab674d681b4f52feeb77e3f769cfde6f4f755f374cc. 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/TCADG1736868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7bbada185488ac02b70bada1792571c88f60b172697cf5d91193ee8ab76af0c. 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/TCADG1736869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55a783d508aa214a4cf48ed31e0915b08832436b1b7e494efac144fb08e548d. 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/TCADG1736870.