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 0x0e3fd09869ec615fa1e476be760863655770fa02db1fb40848d0e44c4f4ce64a. 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/e4ced5c4-7121-4119-ac40-b4a73ac96e5e.json and https://artists.proofprofile.net/proofs/artist/e4ced5c4-7121-4119-ac40-b4a73ac96e5e.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 0x981eb0c16b657e9bd1da8e1b2f69f9ae7a1fd727abdadd0d68aa26efe7b547c6. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/USGH80711704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131bb12c180c33c473b24eb90d0a3ba8faef50b1e7f50eae2646e2db98c7422c. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USGH80711707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf7b52dbd57f8495924eb85f1e2e260b0f972b589e5ae0cd5afd49daf490f8c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USGH80711710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22368f39b8811274597e78fa8187f7aa7f938182e4b266ddf6320a97a9e05f5b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USGH80711712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30cea9a5906eda48968b6d5b424d8bc83aea083149ba292f0b2114e9d566e1d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USGH80711713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edf07f2d7820d442d2f9a3512390fe067746062517ad2b4091d50f6aae891ca. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USGH80712649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac58208dbd4570eb4b14fa46afd5fe7e2e24de2c8076d4d8f9f845c0d06e2899. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USGH80712650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32df5178c39cd3d17e939c124c6ec06ebece34fc4e1b5085d178731c29da81d. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/USGH80712651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b091fcbfeb400b92e4255aa52007b7fd57d85b43e48e1194d4b21f10fddc664. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/USGH80712652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef0797a8bcac459a20abd25a64add793c96ce87ae8db370a24384aecf6863ae. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USGH80712653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5196b81439ba714ba94e10f1c0bb48d199bd751c6d655db574d2dc5a7624e2ae. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/USGH80712655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca776da6e67d538624a3121380017d2060a759e513a94b19d0c05dbcc53b2129. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/USGH80712658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8393911564af9b504d08c8cbfc6949b7d4f59022a6313957d4bf1f3f12469447. 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/USGH80712660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d4ab3cc364e6d47b53b549ff46d6e4b2d84f88e5412bdc16b9150818933b6d. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/USGH80712661.
Los Hermanos Rincón Interpretan la Música de Libardo Morán: Volveré Con Mis Canciones
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d8aded8f747d5548fbb8341438653c30b89cd51f456561592dbd983decc642. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/MX1090810318.