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 0x4cadb9c6fd104a62fb42b7de177fa9da1c84994f4b85165b8459dc8f0d8f5d4d. 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/2f3c12f5-537b-4864-b1ac-9b6e0c062c85.json and https://artists.proofprofile.net/proofs/artist/2f3c12f5-537b-4864-b1ac-9b6e0c062c85.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 0x9418d7cfd628278469c39d4741019dbd342e270ba175c840d4105bbff7b98817. 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/QZMEN2043175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd500aa9a64a698c37ba6342436adcea2ebec29e0c594ce6a636ffe9a1fdf46. 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/QZNWQ2003670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59c060532dc0da20fcbec397375a8aad6fb4544f40d5a92079217777d3fbe87. 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/AUMEV2151599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef0446aa068732a7d2ab3a055fbae0893e2725772ee5a3a2e6b7c47106f0c91. 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/AUMEV2289296.
God Rest Ye Merry Gentlemen (Flute and Guitar Duet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00036018b6f6cc8741dbcf0f1b3eea8b4f79c934a0ed14e9bc0e8a8f6e1083e. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/AUGBT2344167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16f0be013e6b720c49a931a29896d2a591c24ebef243e0b676839eb2a38a314. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/AUGBT2344168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49da616352bc813f741a26cea5fc42cea3b71a9cca8f8fa77f05b431ac64b81e. 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/AUMEV2418379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181816f61906f9816aa0ece314dba5a5a4da572b022fc8469e1ab1e4f862320c. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/AUMEV2436657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e314bfda0102cc478adedc2428acaf0c3ab50453bd0e345710e2945123d755a. 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/AUMEV2135443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ce106fec440a53540c54e507da5d900b98dc0d17ee79a2ad50d422a46758fe. 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/AUMEV2137399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59c060532dc0da20fcbec397375a8aad6fb4544f40d5a92079217777d3fbe87. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/AUMEV2151599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df714e9727bc9d414deaf231cf5cc5962e404c08b93f56b1aa84dbe8db6352a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/AUMEV2243563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cdbf82603e962957888e8120bb299ed9b20c4abd34ee2d72d26cb96af3ed36. 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/AUMEV2217995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181816f61906f9816aa0ece314dba5a5a4da572b022fc8469e1ab1e4f862320c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/AUMEV2436657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2a37b2ae8f5342e35d4ba86f01f24dd4759a74d1d68046cd4edf17dc8ff275. 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/AUMEV2452611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd27221bf8b376f2d5b8ea9839e84c4c87c49afde1d751ce7de9ec1d04330f92. 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/AUGBT2446813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fa7b010899e8aa37cae30e6ec7c557221c501d10501e9a5a4c143e2634a8a2. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/AUGBT2471109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d337840ad8e3c8254b16042b84ad1e124776aec9a7bd35ec96cfa783a7dec1. 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/AUMEV2546154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd71335c74713cc1b979fa29de6f8cb73f2d772ce73cb0b936b15ae9c2872cd1. 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/AUMEV2549355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39017bae0664ab04e3d1ce71a62cfc97ceabb5f9a80bbd25046eb8c5cd884793. 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/AUMEV2552192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0744d0404a2d0e94d5289973dfde66173db918aadb7a6e023c03ed3779ef68. 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/AUMEV2552195.