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 0xde62c1f5eed8e6f3d7461c2203322d9152785bb631cf3ae63ef0186b85f78d7c. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9aeefc92-0dd5-444f-ba72-a3bea748bb82.json and https://artists.proofprofile.net/proofs/artist/9aeefc92-0dd5-444f-ba72-a3bea748bb82.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 0xf2ec52ee5e8995e08217ae195ad65769d0e3744faca0d471934ef762f1cf2785. 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/QMFME2390036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a31217a66dda6f56032e2a5875b740ff386c8c08f66381c2600d11b35a7721. 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/QMFME2390037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9b167956435f7cf10983e05530c7da643dc340aa53f8176eb0e13e04cc986a. 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/QMFME2390039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d3ba6c34e8d84872d7f0d3397184b32f2bb4d6ab0b550ad86be8f273d832cb. 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/QMFME2343316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac47ca5a340c6f3dd86ecf3beaaed51554ff65a0d2c686d3b0ae7805295e3a6. 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/QMFME2390045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7f426a39ec0c9604e570339ca6ba5ab3558d9c01175bd5bb3b200f40fed436. 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/QMFME2390047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc547223da02d2f285a95fcfe2558782e48d08f4f0a3d9d935fc7a21f3f9d2825. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/GBRKQ2147081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51182eb6fb2ebcbc47af645d2ab882cfbd54d6ad4d9f6ca45745b9119c59c7c7. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/GBRKQ2116741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3f97a97e61aae5c84aa4b4a6706b71540ea6d122aa5594eca153688e7e24f0. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/GBRKQ2147086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a3bd6a10b820e90d8e7465b06b1c061fe4137fe19ea96234e03e45f91680d7. 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/USLZJ2177084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf258b192b822538a12bec2b6906cd13834468331331e7c1d620c112f9fd11e9. 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/GBRKQ2147087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159c707ab2ed9bcf227cb5c25166fbec0c004ad63ea1b50fd1d88a6f91ceeeb3. 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/GBRKQ2147115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e4ae024ca0dd07ea299a8713240113b06e042f28e4ba77421e83dcde78ea31. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBRKQ2147116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52db599afe56b895766784794105ac1278ce27abfec2a80125f7a8bbfb3af2f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBRKQ2147117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdd1c30ddecc1f5c62a3ff0da1c0717e00261a13e6c24085cddff9607d5a6ec. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GBRKQ2147118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916db5f6f87bb32ba578336f13cd590b961655d27e3a83b02838012c2a3e1348. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBRKQ2147119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf258b192b822538a12bec2b6906cd13834468331331e7c1d620c112f9fd11e9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBRKQ2147087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a3bd6a10b820e90d8e7465b06b1c061fe4137fe19ea96234e03e45f91680d7. 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/USLZJ2177084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338b911b05c0219137fdb05bc9b8aa1ab09c80f0dd2d48d8d99c89062642a364. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USHM21442223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2542a2e76c529ae33e13b1f1906f1d779496337b1d1712ba5a87bad90fb66a2. 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/USHM21442224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16bfe918e2bb567897f736de94248925a1b75937aed0e4880c55dcf6362e347. 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/USHM21442225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c64c4ed3cd762ac4af5977e55ba80428f81d32c8b6ef4bb585b4788052ff86. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USHM21442226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc358f6c3e96991f4ad506bdf72f0ef12df4fa6cfe72ef02e8bf322c7b4e835. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM21442227.