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 0xe80413c6e8e5402f62490a480a0fbf3b8f3f9cfed8c9365d9fd70b4c92bce9b1. 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/b3e299f8-ce60-45eb-9b26-1f81fa6db522.json and https://artists.proofprofile.net/proofs/artist/b3e299f8-ce60-45eb-9b26-1f81fa6db522.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 0xbc31c3d2ab150334cd469da0f609c95d0086807c2d4fcb987101644532948c4b. 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/ITB261300650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212a4e7cf381fa9d154086f36e5425fe15f1df0e2d6abae2650b3fd7e3d76594. 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/ITNTP1800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30a3b79bac50c8faf470429c205f0fc6780a49ea2a2d0c9d26a1ff994f6ea40. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ITNTP1900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018f422d07ce72393642988eb77c1bf5e5d8a4fbd51b6ddcfa134d04bcf763c4. 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/ITNTP2000050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a042cf6b5cbb2488c5dd3b28e0e954561e8c1c5b05038c389a2b8480bcddb67. 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/ITNTP2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06eca0e44b19004170f9fec74bf608389f5ec6052aa6f4b1aa65a8f0f3af6bc1. 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/ITNTP2000058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018f422d07ce72393642988eb77c1bf5e5d8a4fbd51b6ddcfa134d04bcf763c4. 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/ITNTP2000050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd79d35b943e7294fe2049c45e909f60fd992988cc7381c9f05fe7558801ff9. 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/ITNTP2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba626c8da94fa1c2126cce362fb6054a163796aae2faabe10c0036a2c3cc00f8. 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/ITNTP2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2495b55223f65e4d44604f6c7b47d1eea07a354b6d69699d8614449312f830. 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/ITNTP2100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa6af51deb3bcc72801d2611541b1e7d524c63980494bdf0f0dfc2a0b5c976f. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/ITNTP2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84de28c08b5068d5611543b5693607a971be3d88069d49082b161e716d331b9c. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/ITNTP2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c5aa16ec0a8ed85e4c75683d9225ee1d62e57d5d857696e541e9b6ec3d5e83. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:07:35Z), 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/ITNTP2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a7b92c8348e888240e2212da33b902b05d65635cfcd92a7e1e2310767c4d38. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/ITNTP2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2c541302269fdfd54751b7478671f561aaa3f8a491b70786b8dfea8cc481f8. 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/ITNTP2200054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe762cef4576409294181acb4361a4e30edbd38ad239bf79b2d3ccfa7024e242e. 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/ITNTP2200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499d466059b61a85f2fbb53253f2dcded102348d1c0f819409ea58bbc119b227. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:02:50Z), 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/ITNTP2200074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796393947f9ad995e4c1566bd1c43ae418f138252e462b4e9a978932ffcbedf4. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/ITNTP2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e1b28b6d51bfacf730a0d8698c4f736aa63e922069f53b4499e522ea462609. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/ITNTP2300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b8493b33f5c989188201441685eeaed3d9e12ba312a7934e0a01181512720b. 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/ITNTP2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd56596e61e0066b73049d6bc9d80bff0146070d52ab02ec5950c27a32b6a29. 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/IT3GN2100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08abd83a2c62a3284dc64267ac7673dd42e68547196128ab09725a6ee6237245. 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/ITNTP1700038.