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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4f34dd03019d7b77abc8fa7b76b054ec692e511fc80e610e95b2fb090896b5. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c7d2a0d-b6e9-42c4-90d2-ab603de86c14.json and https://artists.proofprofile.net/proofs/artist/3c7d2a0d-b6e9-42c4-90d2-ab603de86c14.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b809b66cb32103e55ace3ca29b6edb6c8e26ed633d57d59cb9c32c2a2f4f5bb. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/TR2730600017.
Leğe Çeto Leğe (Kurdish Folk Music / Süper Halay)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe241f50b459bb3ff4c169496c19ff51eca944153d71e3d180c62db1c678ab48. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/TRAAL0800237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a8c45fe1cfd9c80112a7008512610da7d2a84a286668cc47d41c0879b1ddee. 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/TRAAL0800240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7159daba2770bf4844afae9f5ab495608814cf82b3012aaefc6774a78f0acab8. 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/TRAAL0800244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455704c9951b61a557cabf79bbcab39c8036f3a4070c6248b79cfd2a2f907460. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TRAAL0800242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454f2ccc941b3e23396f7a133d40c1bf6db3e9c456864695e213f8e2a19613ae. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TRAAT1500003.
Grani Govend Delilo Halay Süper Halaylar, Vol. 5 (Kurdish Folk Music)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6157dcc4e6ff5788dae281ed9227225bcf594d7316276ae2d139e9efb8dbbb4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR2X41749116.
Bın Desti 2019 Grani (Ağır Delilo Halay)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a03fddc8f138664a3e83dedc3089deacc8a707293a6418646ec1b80d6d972d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRX282234794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c2f83fe1a71e5c2a9cbe17c5f274652a6cda34ebc5c3aff478c3b250370c63. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T04:58:34Z), 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/FRX282398645.