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 0x56eabae57ad6991ab9197ba04eb4d25323176b9c014b2dc897d749f1c8a120ef. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca7efb2a-5496-43a2-b70e-d06e1f57729b.json and https://artists.proofprofile.net/proofs/artist/ca7efb2a-5496-43a2-b70e-d06e1f57729b.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 0xc1ef66aff98e93e6f4b8a75419e004d389b7d343725baad0ebdff5af096f4f07. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/AUNV02100294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67b46c8da7b89b9b11cf6e4e4364d6774010f80cf2c648512afd9d732a8c32d. 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/AUNV02400188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b5e05f72b9569306c4ee7764b9e1baaf5fdb59d40a8486bc12fe7fa326d1b4. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/AUNV02500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4bb610e3d3f158700a4c6c047daa260f4b32c759072142c5e5ef924fbe50b3. 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/AUNV01900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fc6a54008c074000eea7c42d0862d93eb9e599bfb4eb80f4b65db7c5856127. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/AUNV01900160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb24ef8652ed11fca524f166401750265de0692b41718685d1a68822db6dcb36. 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/AUNV01800272.
Solid Gold (feat. Kira Divine & Marques Toliver)
Nicholas Littlemore’s The Two Leaves Project
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb79363d35b5d5d4922d40c3a7092e6c742c5b6b67897ee6904e09207064114. 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/AUNV01700123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6784a4f0bf3a48abd8f2a1406e6663674edfad89f874e7e15327624fad77c6. 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/AUNV01600642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d619963e8537711c1264d413a9a631dbf18892605f2cab5ac3d59e8edbefd56. 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/AUNV01700124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715697a6df5881da8a82a1cc62ec71f2db5dc722bffafcfb75707ff69e4bfeef. 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/AUNV01700125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33c983a2644f58d3c975520c2313233892ecc15bbe14a1f77f04e1e81c4f3ae. 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/AUNV01700126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86be49295e20244a83a58a6a6569de98e842cc4fe3f1442e6e20952516ee5a0. 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/AUNV01700130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f20980deb582269ac3979acb9da581db27f710c54a096d5a1092ba4394831c5. 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/AUNV01700131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2fa78a932b4a4f51c0a9753e29392483d1a7e6fffbcc8f634c01cbec734bda8. 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/AUNV01900241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84c7b7da35bcaa4ba223115494e6c253ebfc0fb95190f4e094b4cc0195f848d. 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/AUNV01900242.
Solid Gold - Jesse Perez's Poolside Radio Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91202cb515a2f9635fdd634ba8510984ee824fc2a9f8ba89a12a8cdf212e5f4b. 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/AUNV01900158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b50a327dbe28d5a8d0bc2105e8c3abc58c699aaa2b01f6342df097aaa104aea. 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/AUNV01900156.