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 0xd790995be1b4d6ae52d3c825cdc07b5d595a49d8e7e8ff7dc0643e245240bcc7. 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/03758277-d1bc-45b6-87bc-0439796aff39.json and https://artists.proofprofile.net/proofs/artist/03758277-d1bc-45b6-87bc-0439796aff39.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 0xd4fefb29408de871e5dc034b8a33690827ee695686d86141394304e9ae982375. 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/USUYG1493157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914d8d7a8697745b2e980d5e7449c4528687f87b5a589548a73300a3b1434fe3. 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/USUYG1499223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ae1917b05ce421105c47ac5331278382471e32e452dfa9fe51cbf84cfd2503. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:22:29Z), 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/USUYG1506400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ebb329856c8637e8caab9cad409efc20d15f3ab7880f15e0504a16a0b9826d. 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/USUYG1506398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77972794be7b98f3687aaa028229ae783c6b748e53746802ee2f7a02cede5264. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:46:40Z), 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/USUYG1506402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe440cebf225577b9c2766bc56c10564f50b0ab330f53e609e832dc6275d0abf4. 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/USUYG1506403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc068fd02ca41c32ead22a4c9c5e229db646fa9becff03d5332c8005f3758b4. 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/USUYG1506404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b5a0800ead3bfb7c8fc85755531e27bd0671c4866cd2d68780ca519d122fcf. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USUYG1506405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e7c6e8ec7c343b38050692f09c3e6e97a5b9bffb1997e7f450a33dc101877b. 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/USUYG1506406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71633a4d945d9dccacc80b5ec5199c8aa0163bee1798a58908efa3ea26bb9116. 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/USUYG1506407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e7c6e8ec7c343b38050692f09c3e6e97a5b9bffb1997e7f450a33dc101877b. 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/USUYG1506406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fefb29408de871e5dc034b8a33690827ee695686d86141394304e9ae982375. 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/USUYG1493157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914d8d7a8697745b2e980d5e7449c4528687f87b5a589548a73300a3b1434fe3. 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/USUYG1499223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf173e85d50af986cdd79dea66b0ffd22457e332c7f8d22464715cdf74720b604. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/USLZJ2118203.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0965485b7f29d5d34ef6b0beda9d998eb4f9039c0061e8a11cb9f01be3bc9a0a. 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/USUYG1303004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2815b462072fcd3c453db4b15d7920aff14a0ac2f82583811a9d01800875c437. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:23:02Z), 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/USUYG1303008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd084d1f85742a5846e80ffec9ca80de5cbf08769184ed43f8423e64084bf1618. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USUYG1303010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2cf655562714a57f4eddb9f82ec6147ecd446651efec728948e70f834f3466. 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/USUYG1303011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0965485b7f29d5d34ef6b0beda9d998eb4f9039c0061e8a11cb9f01be3bc9a0a. 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/USUYG1303004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfae19c3d86a6981705c1a85d34accc096e2777554fe728363640e497139c42. 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/QM24S1902532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a8e63fa67cbf7c09c491cde39fe31507fdd842a62191db7e8b06d9163d6312. 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/QM24S1839600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf997b5ab94995108fc7efc4fa8aa73b6cb1da9a649316ee528bd09d1ac458a23. 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/QM24S1833811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb685d60d904ec02b0b25e365310f192d46d6b372c17277e3bf6118b28fe1664a. 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/UST8K1760359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1073c0c4eb73166658826a65e7d0ca23352a2da2b161977b1e3f94a1c93b624d. 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/UST8K1760360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624852e735a02ef0ebdf9bc283cbff3ac033201e60798fdfd8b83c990ed02380. 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/QM2PV1781253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06e0cbf3c062fb1c3976674a36c810d36c1c41a1260bac6a9276e3ca5979a13. 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/QM4DW1722841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587f8b23d861de5c5426b370847b54e2bb6e9d19af0154ed9e118fc0af49a554. 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/QZ4JJ1723790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47959224458e64adfd0f5a034536ea389d8a80b4ad8346a5c4c2e4bb89f89f37. 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/QZ4JJ1607211.