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 0xccc53f18db2a38c0a1a1a45e9e6c2907f441e7cfa6515b707a4164eb37447b4d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f975bd14-c5bc-427d-a750-56ad47bf2166.json and https://artists.proofprofile.net/proofs/artist/f975bd14-c5bc-427d-a750-56ad47bf2166.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 0x2537ba8ef525f942341ebd0346d6357b6106bb3e1f308053972d4e982553bc38. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEA621600122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3965462fe53ecd3997d9778fc4836c532ca71fb0092548c2b51016f8273f25e. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/DEA621600123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a8a6010b42f6797b728462650b07adb45699b2730ff4111190f7b0a029a6b1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEA621801785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f79a20859615c403497c405335e837ec6df286f13a56ef7652f9b379b653306. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEA621801780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a8a6010b42f6797b728462650b07adb45699b2730ff4111190f7b0a029a6b1. 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/DEA621801785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d724c9a5b3686ece90287e50b911ddd7028d42a4b29fee750b71649b67a1ba5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEA621801787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8b7ae0d8e4ba3f8df5404f547cd7e558b70c811fbb9522be17f103d77ea238. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEA621801790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd613ab6b08d5c0a105e0e6feea66090fa1f8603f23771f8ff33ef7251569149c. 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/DEA621801791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606d4a76e6970f9ba58dfec9f82634916ae7ce4281e2410b9d482efab68ea804. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/DEA621801792.
Khabib (feat. Majoe & Asche) - Bonustrack
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b4a2541454677070dd20c297d2d32c163658e76b026d432996248e9a8b96a2. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/DEA621801798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a32e657ca6e2d3970bb151b128a5ed4c660b043ae8c70d0eb4f5d87f95c3392. 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/DEA622000697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2a4f1ef1f6c1f61a79491f1ba91255d574ff249ad04ebe0d26c27906d8c47a. 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/DEA622100776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ba63a557428848d7d196af9204f86293c7aa8ec0131656fa4e28360147b5dd. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEA622100940.
Das beste Label (feat. Majoe, SIPO, Summer Cem, 18 Karat & Jasko)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f10ca4f6c4d37c947fe2f851ee35168dd2e5e701e2c82c37930ffdaf8e390f3. 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/DEA622000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9f87428e9cccbe22bbfeef06f01c5aec21cc1060f3850812662e0e825d5401. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEBL61300713.
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