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 0x5dece5ea0bdc10d512d36f5794a800bd66ee8f607ff6fc02a464a273a6042c3f. 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/fa73c2ed-fa30-411d-99da-4a06efbf4bc7.json and https://artists.proofprofile.net/proofs/artist/fa73c2ed-fa30-411d-99da-4a06efbf4bc7.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 0xc0c7a155144e3e507edfe6561e5f6f27489a5a1cd73e54caa0a6114d34a13ee2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR10S1825459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa490e404a10b8a01658d68ca5a8dfd59e7a69cee86a41689e9ae138345c44001. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR10S1825460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10724f83fdee073d2213f6d8b606e97a4a8df2812bea44092df495bf79980d15. 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/FR10S1825461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742aa9594d28e1182bfe4145d800b5d3e46063b7d178590ac1a96a8d3eba4a3c. 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/FR10S1825462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b326599341ef05de9d45489d903eb528056d847ac0d035b8434af050b86600. 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/FR10S1825463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f41582f7c1fd0f44503bc3f8a922febf1e16bf50f5503b32c115d99778b77d. 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/FR10S1825464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa947690f4a988ad2e56bafcf7d463fe572ab9b4ddce9c3b5640cea4349686007. 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/FR10S1825465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40aec4646e93961495113e01001e8b4e1c26cb341c4c15c09b25822d49d157bd. 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/FR10S1825466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a72469afd31540d3261e498a9faaf19a9bf83dab16add9b55358656b613527e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR59R1756174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011eb19176edbe79e74120826c00d3b3e6e059ac4bc34f9e784ffdf0c09c221a. 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/FR59R1756175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251ae02702173e3bb795b0ec54f730924b11386d2ba2b3c5e20c63f503901a07. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR59R1756176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f7ce7198846345061c188d72e6fb32cf549c132ea252189aabd97d57ac86d7. 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/FR59R1756177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5d26ca4cc26982172110048ccceab7873c3b2c2b9963ab0630f47f0e86d0c4. 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/FR59R1756178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340d17c4268884ff25f51746ecb3b39dc354c4bd6271bd0782d1b5b057168549. 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/FR59R1756179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312505593c9798f27581f829e172afc7c3e8d99cc7c7bb4dbc4d27ba0386a492. 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/FR59R1756180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7387c3d4afa75713edeb19d16749f9d846c05f0450eedc29b5d1b953fa0f977b. 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/USA2B1302097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23818265ad3a459ec09f9263e04359a075992ee28fd681d62662babc3faf63ed. 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/USA2B1302098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7158a59e07824b08279f6a3cb862eb9e17e2902211e7af3f38fd8f879b05319. 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/USA2B1302099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33078b9f1da4c9a0ef631d95ebc4f6730ea9321ec29f96b18f7120e9a59d107e. 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/USA2B1302100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c6f1327debea6d6ef81c5ce21ba4b15ad1b315c62ba1a7da91c26d62055635. 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/USA2B1302101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24e29a6896dbb3e27cdffd80d1642ba52d61df1c921c8e9b321f09fe8afffa3. 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/USA2B1302102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a64286a4d849ae789bcbe2115eff62c91ec9553e3700c25b39443ef70b8093. 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/USA2B1302103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe658a8a761120b44ec685cae34d732187f9e92c975f2bd7806621ebc0843f1af. 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/USA2B1302104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34f014b00407add7dc2afbeddd2740b32fdb77669351b14deac4136548a61d7. 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/FR59R1756160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18494ab766587cb5cc21913789924add4960e46ebe2ea1ca025adf9c28b2b73. 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/FR59R1756161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7001ab553a5ffff8bdb21b1277276ad098aeee7ad1660b922c84572bb574f9b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR59R1756162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64fb1c328c1e3caf390eae9de7dc89c36a4b877d92cb062f3c1b0a378b11be4. 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/FR59R1756163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac330d16265ed51c3b0b9b2e4461c8f618cd3e985afabe0ca78f5a9644251eb5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR59R1756164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2acf5c10e622c5cc1e6f66f461c939b5d891e20aa9fb112896a5060a87d5e5. 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/FR59R1756165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9975c0e16da6986178e5c876c7ea62dada659dfdae33120a0bf719fe20b839f0. 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/FR59R1756166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90e520f3b483aadf0f8a9cecb815c8e50281ad9c1b64232b545ecf71ea68d41. 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/FR59R1756167.