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 0xe3c24774a2797cf8df6b57010d7433a753de22431ceddb062ae5cb0014039ae7. 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/008ae32b-990d-4b63-8db8-15777dca51f0.json and https://artists.proofprofile.net/proofs/artist/008ae32b-990d-4b63-8db8-15777dca51f0.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 0xa1554ea518e73cacdb097ef29092c8b4e22dddc91fc5ffa87da6013e780f6589. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBLFP1595531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d67dc8e5db191c874924324c5d0012d40fad7e8a3e7802284b60b0b15efd684. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/TCADD1704436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452ad29278cc1e23ad561c8f8235a6d677fd024f47574b4d0a4d33f3d731103f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCADG1747263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17bf20341a30616f2e0fb205a982b41cfb997430d8d8f131d84e1bc15c0f4fb. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/GBKPL1788370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3593e28ea17f5b3e6e0fd413f35621ca4f4db47abedef3883cee538311ade2d8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAED1924902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4422b41a0fb4ce6352f9d5dbd803830ae7c07c5368f76055282c6290f7acb0b9. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/GB2GX2000053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf1a83852a6abac2b01cd34c54a526287cbee9a8bbce2aa50a034e76cdeea4c. 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/TCAFM2179509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5434c082a09862e25dd9abbf151502fdba40e5d75161e9b4bb3cc66d98cd98. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAFW2150259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818d3abd069c4ce65a20890c29b764c875aa34e3bbb425581cdfb9033c236e86. 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/TCAGB2220858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeccb02665797789b42103a5207c6a290c6b1a98ad3198bc1a79a9d4f5917bb9. 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/TCAHF2329467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f58bb5e0da5fb79272d275938d635112882072b8a5e554b435645f184dfd0e. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TCAHE2372796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5820915da827948a51e9291f64410146612e9974f0cf5bb5143c85622a25b43. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAHW2414592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2a30b33984c1a066b2aa086ef80c7bbf342a444887bb3e44518b2f2c48cd63. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/TCAJH2503587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aae818377c245212392e7b59f9d982befb8862f59378958223e76fb4ae45020. 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/UKXN22474552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e79a61cd22a48713210f0ea65eba6e137cb8ace7dd7bfc549b4428d0053c3c. 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/GX3Q92097506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a92a63016fb6e5d4dbeb0798cc6e567e634fb707d7b2d0955de3011760dc17. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBLFP2032287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e1eb792fbf22c41a0d27e3037aa81f8edbab2babdc9c441401c4fc76fe1f66. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBLFP1902424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e1eb792fbf22c41a0d27e3037aa81f8edbab2babdc9c441401c4fc76fe1f66. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBLFP1902424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a6ce3c8a96dadaf6b68507a712175e273c6a44162d1eba484c045d0ef0321f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBLFP2494625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a6ce3c8a96dadaf6b68507a712175e273c6a44162d1eba484c045d0ef0321f. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/GBLFP2494625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623efa7a8fd424cef5703756873006c194630cd2cc4d5a42c754bdfaf57347fa. 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/QZWDD2516294.