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 0xa7222e372f301c73ba7da0e8204eef2cbf7bcc542c88a3874bd68738ce9a44d7. 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/76c56904-60a9-46a1-a931-ae599425958c.json and https://artists.proofprofile.net/proofs/artist/76c56904-60a9-46a1-a931-ae599425958c.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 0xd744d83b5097fd635d3a5e79a55d3700cf9bcce18c5fb0bf3f2ec672b5502acc. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAHU2424321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8630ff270af63b4522c56bd0c5e69157318690b43bb1030d55e817308adf40. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAHU2436120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4635ea59576cf6315bdc8b41143ecfbbf757cd07c0b4d8518112828d6e1556af. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAHU2452316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5157eb63256689bd5a4aeb2004d64ff9a4043d0e2fe7995f9eb79a91694798ec. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAHU2493315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7056de289a7db4294e5810d8dca19c1a2c5b7b776711ea911d881d2fd539841f. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/TCAHU2493316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9c0baec88a1fe6d370062e92dcab3eaa276a0e74bd7872e73a0ec0c53ac602. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:32:29Z), 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/TCAHU2493318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65842552c2c21ece0ef0a152bf0dc750f83d5c8fb4316f68a0d011fa1a3a84d8. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAHY2431812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bc12ddc896d89a07e65262d372a8afc8654f2710f0c5da9a9f7331d548ce25. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAHY2431813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ae16272ce19013219c56e81f28c0866fbddaf209741bdbb250b30228566e1b. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:13:26Z), 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/TCAHY2431822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7f34398573d75832311fac167bcbb90a2b8793a12b38aa290f9dddd22648e7. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCAHY2431825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28e30072fd07bdc9bb7c2b77fcd0fdf5ab4cfff3fb12eb8cdb273797fd3fb85. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:56:54Z), 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/TCAHZ2469612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35640fd95f275b63639e08d93ea662b33049204822a3a2ad2ac5d9170c918ef. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:23:57Z), 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/TCAIE2472737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2903a9479bfd32274b05d2cce446082af334d0e7285d4e5e2676f72245d9c42f. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:41:34Z), 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/TCAID2472738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3793a2834fc26e0d749b6ecd5d1609c3ae20645e633b87bda3aee4ba7e9444b8. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:53:11Z), 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/TCAIE2472744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8756eb6002aba8fe034d82c4e0d5715b8d113a3e9106e1127b35b886ff845384. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAID2472748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda17d0a7fafd25476e96c043cae54dc400995c82437bd076e0a894a24be8e22. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/TCAID2472750.