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 0x22ea8f5b5e8dac17ce8c039eac419e308094ed52c55b503af199f4aad4e74d8f. 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/8eebf902-f250-4104-ad77-3bcbda36d745.json and https://artists.proofprofile.net/proofs/artist/8eebf902-f250-4104-ad77-3bcbda36d745.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 0x391fa26be798b15f9a7ff7c6b04baeefc7bfd415e73bd07df16d0408aaba3d6b. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/GBZB41400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa379d67cb556485bd80e5c83b73dc19274d3ae2a09f2bec85a22afd879eaf619. 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/GBZB41400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc05a3ba1dae181ffaac971b254f4cd19b20b6858b12ff40d31554b7c22eb53. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBZB41400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb826a100567976a16df24b32e2a72d25045b473fb1cef92d9722ab471a47d935. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/GBZB41400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0f9b848d2121f6fa97d7e8b56c69740fa5ff9df2d38b94087cffe176355cb8. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/GBZB41400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b26e48f5c37a8f6d90d098d75c2e9f265699012ee89374c6341216d22c03eb. 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/GBZB41400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe438474b376aae75c7b8ea22cd78070eaf035e5ffddca684bc6403b3ae228485. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBZB41400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3463cf22c48b13644d6f81b9bf36e1cc56959c2548d1d1c82781436c3c3a3d6a. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBZB41400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2f2009ca58fd5fd7719b0c43d9242d65b5d0cce1928c7c4fbbdc88c2e5ce91. 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/GBZB41400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfebc7a19b85e56d1dbf9317317f1f32feb6003a5e09e99b186432c50436baed. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/GBZB41400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7195f7a2ae1b5b041e4c70bbb4b2e180b44088a3be912707453cf8872d9cb0. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBZB41400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c89e2d3b5a2d0068243b1f13b8f960e7eb9cf14591ef9377a5e88bf704d362b. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBZB41400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c22ba58b51442776b1055e50ba5044b500fccede4543a6b832747ddffca98de. 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/GBZB41400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1448fcadf9df5fc313996ded6fa75979089a21cde2d0bf0b575b772627ad9c. 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/GBZB41400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc9d4751a19f5fa2f037bf1f3b7dc56e563d47ef5bd508fa9c0caa46a78535a. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBZB41400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00326be55a86df91818122a842f5960d009effcd8379d3a09599aecf853b61e6. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/GBZB41400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b80c16b71ae1c6ed784f7f5e14332bfdb0c5fc9b4b7784ec151b90895d8329. 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/FR6092300002.