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 0xb9cce8efb62e03d9dec1d6e49cca3e744326118abec2085dcc575528ebe8463f. 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/86986558-3985-497c-97ce-d676f85b19a6.json and https://artists.proofprofile.net/proofs/artist/86986558-3985-497c-97ce-d676f85b19a6.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 0x9bc88dff449118bad7e7089182fb8dfa879f1e95c3399bd5481ebd2ac5387951. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DES370100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6464365db12a901d65576985ef02253cd36685d4df39b372fc008fad3cdc414. 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/DES370100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f48f7e1df96366cd6f2138200443762eafb72bb7cb5355698ece33223ab1bbb. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/DES370100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f9531b462086d48c620b3fdeca10fec42080981491bd9dc3ef02839c87cb32. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/DES370100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0b4e7f01f6d6d12b28cf9cdb97151698021fae9488c2763c898ec93f3fa6fe. 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/DES370300160.
The Darkness & The Light (Solitary Experiments Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f216fbabfb9d84bb5b685eb70f5b05c6c5548658cef6e32c6f240a78cbab00f. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/ES59D1710016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ac6197493424cfea1b642ca65567b612be4152ac7b3860e86e08ce9fc3a2c9. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/ES59D1710001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898985c68610d898095ad0b859c488485b0292d981de7e80a6b2de22bf54b1a8. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/ES59D1710005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf073740267f3bca722371f84380a58767fba7ee57bae296ee42ea8b88338584f. 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/ES59D1710007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c20d16b9f82ee47268a2e69d8fa2e9a2eea3acaef514d331d4ab89a98a0499. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/ES59D1710009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a62bddf8017d87c278b18920540e4ac3893ea2cd639d18a521d895ece75a1b9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES59D1710010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7baa0c738206a35da643d2a3e97885b64df6f832286314a4419cd1f0584c8eed. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/ES59D1710013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf400bac107f805e4e6512e03bc410202fefb196f62c866e7e20a6bc9a1552e0. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/SEYFX1900501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a548b1b289046c1e25c40839085d151dcb8adfca99d1e8a755831ffea8eef7. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DEUV42100182.