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 0xc921d4a1a4c7de9905c64f5f6e739a8958024b28e6e7f4e94011296bf46f0af1. 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/31d48d55-55a1-40b5-a15e-845a7ad556b3.json and https://artists.proofprofile.net/proofs/artist/31d48d55-55a1-40b5-a15e-845a7ad556b3.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 0xcf286320001216bb5589ea838b232fc986ccb7f183ae3ffb159d9b7ba56a744b. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/US3DF1633498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd24980f13f7cf174789a7758da61f958832981571af9c35e77a91881e22caa6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/US3DF1633499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a78378a9935f421d5372467196e37a97ab01dc748285102043517ddc60c1ac. 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/US3DF1633507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340309f18e6676e57fd2880c890f050ae01a74f23807f4776133a5cf98ded834. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/US3DF1633508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae79a82eb277a5ab955f5026dbc50609a29f27a7a42ebbf184575ac559abc9ca. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZWDE2356158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffc5271aa08e057c24709ae610133d198e8be436f6da518e7c2db6a464675be. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZAKB2438199.
Lotta That (feat. A$AP Ferg & Danny Seth)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01402a48f8dc75126774581412b98272225a8e4d77892a00d403e58376f1f79. 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/USRC11400737.
Givin & Takin (feat. Danny Seth & DeJ Loaf)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9710eaec33dba94a05fc6254a6c68d3163f573f35b47012499778e9ebeccceed. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USSM11709127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc765e29680784ac8a8c2816676064267bba5282818d445a038328a482f5d5645. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/FR96X1624631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841f4bb1326c000bfd351901e87367133e972d6fe073b86c6bc28fff2cdef356. 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/USLD90812662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe867124663758899c97abf42d17bafdd0edba6e6961a7ee63640c2c6bd75db01. 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/DEUM71800011.
Belated (feat. Danny Seth, MD$, Aleksi Asiala)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d8acf33ffd2f4702c21407ae604de172fb94983a548be713291a3c2d869e69. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZBRF1817227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935985d967e6f3a431c36dafbd138171ba392ae06ee3e172a3107301711e9785. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/USLD91716365.
Space Danco (feat. Danny Seth, Jace, JID, & LightskinMac11)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e160ca0c0d7c4330cd76ff2f57fb9d0ca912ecdc0ea6f8df07f6a2062f6ca56. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/USLD91716375.