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 0xd37bc7239b999684d0343494b9744eddbcfa0603ca3ccdef5fffdadb4e7b76d0. 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/a14f206a-37f9-44ed-95f5-cd5b9a5388d0.json and https://artists.proofprofile.net/proofs/artist/a14f206a-37f9-44ed-95f5-cd5b9a5388d0.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 0x0c49dfdf35ad6a2fe123735f970f9f981e46a1cfe9e5999313aa994b3f1dbdc7. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USUYG1124311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb967ca66294a566fa2e87394a934c749f5ca17397489727a7a8176033e90946. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USUYG1124314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfc002f8c1b414f51a233199b129e8acdd0420e12aaec9c1165d4f8a092c159. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USUYG1136901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230068b377f2d3a5dd669ca850fae4f956e5ddb7356de6c99e6cde8de447b68f. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USUYG1136905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88843d18d3ea97cf5d5a4f0eeea12a20d2bae5b5c01d557972e9fb218b915db. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USUYG1136915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52371c0f4bc793329cc7698d28e3e8dae42cb5b116114c166bd365ba77c2497. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USUYG1136923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f9ddf8955d8bc895224d1d4f893ac1b3dbf35753fd2050096088b0925168b4. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USUYG1146510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb877a1829c96b151a023e192b9977ddfa56ca284c56ae8d7048e9d36bcdaf90. 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/USUYG1146519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7d08ab15232e088ad18560031cc460e7fbd3d633716fc86593a62e9811a612. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USUYG1201113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21eb0222b45bcc21943481926f6da5de04a46c8cccfe298180725852a54a518. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZDA61818679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb704641d79528f8aa0ab71a678fed84d28d31032ee5d43b22d0ebb737308fa4. 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/QZDA61818680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118a935be8c75bde417affa3b31c7e4770d424528edd26757fa4f85429833014. 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/QZDA61818681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4bf47a784b7847065f26db3f2b299eec62121bf0cb2695b790b0448053b1f7. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZDA61818684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e3d75f42ab5d791395e9486d8683970ed42a06516d110993851a0e699bc836. 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/QZDA61818686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5228edee0fefa2aa50b2cd9647522ecc27e8f52aa59157f618c82db521ef46d9. 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/QZHN81902584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760fe36d53dfc57b99414a1be4014c0e97c7c404beb80ca21c60d2f453e6e78d. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/SE6HN2065164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54088f74373bf24204286d2f99803b91c8ed8e3100d3adb173b39148be9041f. 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/SE6HN2065167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b275d4d4b8cd4884fe466d0a36926a8956de938ccca50b069f71d4fd9dd210c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWR2279618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d64c3bbeeb21fa8c98e921214e0085e3498981a2a53eec1e98c72ebe45d489. 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/QZTBB2481202.
Win, Lose or Draw (feat. Quentin Miller)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996ca87df31c8c9aa2e8cd9cc4f36b1a1482b8f966b1b4f31cc82997fa298422. 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/USAT22006633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff2c96a72bb2c46f7724c301540e24862ee938a09210bb50e11f08fbee94629. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/TCAEP1909942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf19339634bf00a848ef6af96b6affb7ec6e5158e9300d03dc97b0c843aec83. 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/USUYG1118834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69710921fbeec430a36d93991f050e0f589dbd4d3bffc09c0eaccc05a1605a8f. 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/USUYG1121519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732062306cdc8acf0d6da96beb6b1689028c2b1faf35ffd23dbbdb2951dc5899. 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/TCADL1862835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7ef5ad1d1e9073f48cd58ecc7cc4326ba7334a6b4fb19382bb26cd1ecd33f7. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/USUYG1088728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f606553f55325da0eb707c047a8ec270c8d31369818d4044af77fdca10e2a43. 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/US23A1554329.