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 0xb8d1501ddcd81bc7585d68eceacce677888f6b1e7701a695d253aff4215fea40. 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/1e71dbf0-54a6-4f46-8592-2f9e77bd5819.json and https://artists.proofprofile.net/proofs/artist/1e71dbf0-54a6-4f46-8592-2f9e77bd5819.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 0x4dee7a6b8e82e94b1fd95fe5ccdbed82e92384603f5ebdf1cbec5c2829bbb1cc. 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/QZHN62413185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc98c5386984a3c244470fb76394872c47a008ac632704d0953a219c7058cf6d. 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/QM8DG2476099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e8bb9c4956b6ec10e4b877556e3f88fba9aead19669ae6fb6bbf38b674fbe0. 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/QZHN62413186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefbb53eee5a36aa713486d32f699028a8790935f5ebe7e0c9b15be09a6172ad0. 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/QZHN62413187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bebf9916b535ff6b1bbb1a47d7e79a72fab87cd67e932fff3f5c99cf3f97b02. 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/QZHN62413188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c079c8c680b112bd31dd43c1c8b0354ad2253000806af4db9e13295759e22e. 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/QZHN62413189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e53d35465ad7c5771b74b2be4e83096883250218775d63a1a6bd8f94215082c. 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/QZHN62413190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93dc938b1cc7e423de63a5957c90b69db54d3cffbd4924aa8992269772159ec. 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/QZHN62413191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1172b8eb43808692edf2cab3f4407f193a7301566bb5aaeff965e09c4e511f6. 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/QZMHP2492667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8da9828222093b35cad565b22ca06c18949cff6d6377261ae7ff6332c547e6. 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/QM8DG2447892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e5b3431cb8d4f310644e1a57eaed9748723729e0d7282fa157cf49d172c84c. 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/QZPLS2494830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbae7f634643c9b6e48ca78dea08e18800a004bb16df4a8dbcda3eb25df8e479. 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/QZK6F2374147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb43ef13581aae9b254630aefa9d9329032880f794b5754080dd52345bc339ba. 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/QZFZ62373252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b15c066252d91db3445063db153cc734aded211dd030ee7370a1c57fa8e9d00. 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/QZFZ62373253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e368add39ff46820e094441ce0216fe7b35c4d1919ee47852931d6ce0283c8. 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/QZFZ62373254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde3fb5654b7f58aabff5c0be8e0dc6c8e1c40f86293de9d86d22f7c20043c73. 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/QZFZ62373255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525a7357a7dec06c4a1ca748206ec495f9fc45c3f3c76adea6fbc0b1f3bf7155. 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/QZJRB2296260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df43e61061fea96dfc9b2c3f7b81cbe6f3744366eb9fb127fd53e2dc25449ea. 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/QZH5E2256764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254acd267bffa40ea2fae68631b4dc817f7a3ae8afc64b951e5a2f1d08b0b4b6. 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/QZTH92233809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeebfd8004d6b354847d79031f4dd35f0d5935b08c2ccd0561d35b35439b5408. 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/QZNRS2197540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291841ce37677fa582dba420cc03b6ed7bdcad86b223ef361332a0f87529e956. 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/QZHZD1939749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be99ae5fccc55f738aff598c7406c55f79fcbb1dd44ebfb3aab29d6110a3217. 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/QM42K1988354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87b25cfc374f0b87e5356727ed51115514d860d9e52f1a997ba2e09871cab61. 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/QM42K1990858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9021ba45f2b08640f98da61509b3979cb028109865122f1b0925ac240988776. 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/QZJRC2085390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f07c667b4f25500facda8e8408d65597a860460dfd1c22f581944bc767b350. 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/QZJRC2085479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0253f67f184b350ccb68de2df408f103b8c70625a8050948e11519f2ee725326. 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/QZJRC2085410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5b7fd96bba06af8d41470a7d361ef5997abe837c648b4003feb4c83fff03d1. 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/QZJRC2085402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836df8a555358fb103377988357a5e5e1e04146b91f764234d648660a48f042b. 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/QM42K1903428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab2c4659e45ddb7282590348dd9f7789bb45d62accdd0765d299c192df2544c. 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/QZK6K2080235.