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 0x73e17f788179aa70ef343ddccfba0fb8d1c244525baf741b1ebf6041e6c78bfc. 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/c6be23c7-6e63-4b80-bc9c-b1b4f0a19d31.json and https://artists.proofprofile.net/proofs/artist/c6be23c7-6e63-4b80-bc9c-b1b4f0a19d31.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 0x36b09faf57ba497dda1388c39524c9e37e48ae6cb796fe632874cf60e2204245. 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/GBVHN2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7be6191ed4ffe992a4a6d638e16ded7fd6bfa614a0b03f6b2078c4d8972519. 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/GBVHN2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43fd127627e3911f30e58c607e88145bce9d943bc0fd6b1db757b50849b6a736. 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/GBVHN2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3490386b87dfbe7b3cd02d9c9d85b116cba2eafe493e55cef217ada70082035. 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/GBVHN2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87cb9e5813a3919aea32465d364bc3de169e47a56901706dbc87937d67ef4131. 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/GBVHN2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1353cd6d13e77af231bc3f34bb166c1e639c15a416f4e5d4e8504bcce553792. 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/GBVHN2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6826036cbd2d921ca8478f8345fabad3d280154a69e36c81892266cc43b47b2f. 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/GBVHN2000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4ed35d42069386033ce81bac7bd696f09ef0b5c835396547f38dda584a4fb5. 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/GBVHN2000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb57bde5b1e71e8dc2818ec270c2bc93b09f6aca229c783e8c31cd75fd3bc777. 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/GBVHN2000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72da4693bf61c0c685ee26b6c3597c22a454e04920d71c2aee52459b6547f76. 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/GBVHN2000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fff5a775f355412074b62c5674b3e63e3d2099367d3a2bce94e9bbaff2eb86. 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/GBVHN2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241ea2db256f6f8510ed9b77a7d21a7eef3049f2f02abffb8386b4b442bff91d. 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/USA2P2265014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a11fd93d07a98a66f1bee87d647b4cd3bfa4ca2ef4eeaf0b50104a648face00. 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/GBFFM1479162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e08f4bcbceaa66667139af1a5fbc94d3960dfae56ea9d875374bcbc7094113. 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/GBVHN2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5d60b050175ae9c6af7007a0b2fc5da1651f0cf83a8fe25836e2a68704d1aa. 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/GBVHN2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31a8fbd43560fd44be1d900df559b2b0a395ffce46a1f9ebbe64ae6109c1e4c. 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/GBVHN2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc8bed5c49a0786090a122f0f70cc0a613e52a3b59fb3e1cb2fa53778ad861b. 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/US5ED2101000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd50b82a0b3bef7e7d9422560c96117818fcd8e5e40a64b45eb1bdb686d27d4. 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/GBVHN2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603af01727bacdfc828e0263beabe49b77de991a2a53afdd93a60d0d67950fb6. 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/USA2P2105995.