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 0x0c10529b0c83d8ba057023e369e7195bbfb41bf277e1dacc9d4f0175fa3678be. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d01bccc3-cb5f-40ca-8522-12ac61092438.json and https://artists.proofprofile.net/proofs/artist/d01bccc3-cb5f-40ca-8522-12ac61092438.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 0xe1d3d0f6574bd017311c2144367f93e4c727ad8108ed158059d5de138628defa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6P42359644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b69330966835c324eba04de2141f5828a36cbbbb22b4731379c338f51e1f676. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM6P42359638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66be90c38e0bc0910722f37178783e0c2d11bfa05c36bb1fa2de0212c2053186. 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/QM6P42359642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896fcb07f711cec4480ff46c860b594b6be7e1429b68927ea070786e48d56f12. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM6P42359643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300b29c5e88c8b5b1a7204c5a045b838f1629c1b63662c43dfa7fe162b714265. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM6P42359650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df9ee182cedaf809e40177bde632ea05752a2254b861cf521e46c88ae0a5359. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6P42359649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe383128db321046cb4321a3601a4f336261efd4815fc3855ae7b6a847383761c. 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/QM6P42359654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe858eb6cfd97d4958bbcb7a1f3447f09be23b48234c840f89ca2fed5e941ca18. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6P42359652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bdf2df3adc4a40ecef2b272c56e7a02d4bc778d42fc429b2ce795b411cdb863. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QM6P42359640.
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 0xd5511a684a3ebfce4908217fc82e96ed27283d7e30a2ff40db947f048042f5ac. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QM6P42359648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf72454adfa1ea0516bf4c27890ce88ca443811dbacc37e3ccaf9a526ad65a44. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QM6P42359646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c8340c92012d5e0dbe4e4932f84957f2fae214aca113158799db2d6698985f. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QM6P42359651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0241743394fd499ef52e5c548dc1469303e0dae3f96da0526457052efef96528. 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/DGA082285161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae678d853c3903a4861d826dd0adbb13cf6ab34bc2dc37f261f99f8ee2174eb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6MZ2390767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08eeef81baf1e77b285c78ebc22d44e844589135f7529dc9bfd99db21d4a2325. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QM6MZ2390774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa737ef7babfb13db131cf67603f858da31cc1c55b9ab8c10bf2a04589270c94c. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QM6MZ2390775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece931d584f5f455a7bd7522d525427dfafa716c7cab1a53816ae4018002bc67. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6MZ2390300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8d8bd8d8daad6921963df85bcbaf97574e3210c334721c1dedf3729643c047. 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/FR96X1876544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbe3a13b35f5ba7b9d23a57c3b6e17d6377c9f8b1e0017213c2ddd7f5202e23. 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/FR96X1876546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0094508253fb854654986e2f8bb8909abab9d34f5c23b72cbe1874e1aa8b75ec. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR96X1876551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83a1877175f48b39c0d68fae044152ec8ac43d69cc6f318525b94247152e006. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMBZ92317236.