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 0x05ca8ef0de2241e0635364262204f195e99d2669240d93c924a734ff3067fd2e. 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/465b0ee3-38cc-4b8c-93c7-03b002a93bd6.json and https://artists.proofprofile.net/proofs/artist/465b0ee3-38cc-4b8c-93c7-03b002a93bd6.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 0x28c0d84253ea62c9c0124565c3412d1566c25a2fd42d6326909abec81ec29b6d. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/USANG2065506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9962d0b5fb59dcddefef57d579d9a694969c0ca821b4ad2fdd91e0a244e4a07e. 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/USANG2065507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f3cdd61165e1e4be7c3a1910d082fccfaa9fdeed2498a8d567a7460ae00e97. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/USANG2097332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bac44f240cedcb25ab80c628052bc96a087be0f2fde5874ea01c279dce246b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USANG2020713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ebac1a375adc99a6f56f4d78d29dac2fd5e44cdb18fd553162acda2263cf57. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/US3DF2009117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010cab7b16dbe443af76fdb725847039481ad71d60efb75a53ec2e4c46aecebc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US3DF2069037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8035c1f430bba89217e7e52fad38f8338d3e65b52c92bc288973c6b3fbcb578a. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/US3DF2092498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5af725721844b7aa6562547444e5cf788372fe717e985b6b59ba9338937e410. 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/USANG2002772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00faec31fd32e2d9138c759583a81a2442c9b52826180d3c6fe8973f862feae2. 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/USANG2109351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70005b314093f501e78affa77feefb10b2e1bac34f0cdf3d33bc28bedde3b35e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USANG2156560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0cae96ed11092bcbc37a535e2afacfb05392b92a5f6d9a60a4c9f18278f5b9. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T11:57:43Z), 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/USANG2156561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f80b1fa8344b595df5825553a46d34240676ed7f9f99bac4b90c119f511ec5. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USANG2163781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031429467cba3b28dab672914d022c33c8b09077297011b73bc370def41d982d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USANG2163785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc28a71883fe6125a0f8838dd9c50ad10bb64cc29548d2329f48246b755f2ff2. 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/USANG2167775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7d026a2f4a5e5f6043927b16ba8e110aa187cfa4122586bc94f7abd76c80e4. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/USANG2174514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d30688783d6f230b7574f373f35997d506285046dcc40658b3fa9fa727e3091. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/USANG2185065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee1241280d2e918df361ac135db8b7aba595f87e72d7fab767e6359995a1acb. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/US3DF2103279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16adfaf9ab1c11ffacbdee05ef5d749627a0490554639c5c116751c78eb6c4f. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/US3DF2121401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eebd88446d3f18b91bb283e59030ef0e604bfc757ae85968fc91911a5a29f17. 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/QZFZ22021041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afd4903a1e13aac3bb27abbf3bffee283e84289a1a1f45661dc9731e5d18dfc. 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/QM3DF2108731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce6335c831eec7fa98250c7dba569a1cc18b7a17ffd79dbe9bb60cb6aa6007c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM3DF2108745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb900f105336fa62ad3804962ba492ab0355cda7f509eaf69cd424a1f980f55a3. 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/QM3DF2120520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e70ef27aa097e8452c40f113435eff89a50d3e2319c09caf908909dfb61eb69. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/US3DF2201982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcdedfaf09b80736844ed2cb867e1a3e4673b3015313fe40e02efddbe193798. 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/US3DF2245091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d52bb310110d3d3a39dd337f8b3a5f402ba0ff7b6553eae2a41dc80808cb12. 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/US3DF2245092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710eed9bbe54194e7bb14a24b03c8cd0ea1c75a3be87a8cdd52b9e47bc856b81. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US3DF2255448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1f71f3d27468c3e91d6526dc6506e3811b91ff23751e220052324efe942361. 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/QMANG2214662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66537c9aaa1bea36ad87b4f675228b498c0c2b698245d3642c67a180af0d02bb. 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/QMANG2227736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85fc8e1cd7802b991c60fd4c078de013de83ff8c211f13e443917ae1d3250db. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFZ42502162.