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 0x30060de625eff8c550c368c821a902fb4bf0e4f106c14aca47b83df65920392b. 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/416a3786-7a0f-47d0-a565-11a59bb2aa87.json and https://artists.proofprofile.net/proofs/artist/416a3786-7a0f-47d0-a565-11a59bb2aa87.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 0x5346538956e50f987617113aa821a0b174dbfed793493b4c728a10222a9da3dc. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/RUA1D1809158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd04b5a101c5dbdec7f8338ff8d3b70bd41675bf8290b4f26ada32eec9af320c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/RUA1D1809161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fb83371356dcaa3ed1d603e4b03b40d242e2d0240df4defe4984fce79a0175. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:06:44Z), 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/RUA1D1809165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a48d46e582c031533c3595216f635e7c48e037b0d0c55803242991011ffb22d. 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/RUA1D1809162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a76a5f7948acf31a1719450a7d3abe51f94a5e72d5c3da88651151f1f809315. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/GBKQU2284881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cbd639854f1241d261c3a829e92e712d370ef5072783b1da920bca4edbaeec8. 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/GBKQU2284885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05be410745050b68325db85f59303db1fb455f2b3837001f329105c9f6fe0eec. Chain 2 (Bitcoin): anchored in block 957629 (2026-07-11T23:44:46Z), 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/GBKQU2284889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871d3e21fd6bd91b4f71dd4d01b79c3ac03dd2ed2969b02e2894e11b54a153f6. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/USYBL1900324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264710170123cbeed3c868b88919bfcd2c1d2da0d84b88cca19bbb28b6c26f45. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:07:57Z), 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/USYBL1900328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892f6542dca064d4e3fa707fa4c736b4440187c0c44a9b3629011fe0d2d5c4fa. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/GBKQU2265632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e136730fe6461397137614ebde024a1fa132150808a189830776c97bfb85fcf. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UKMH51900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82cd24904c86eeb26923e04f481ae8be51a41a8c427b21d64e3c8816e0a600d. 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/UKMH51900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258e1d749ff7c2dd5841be99aa5aa549208ad733a5e8ec651969d56f7316610e. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/GBKQU2367563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0726b82ff1f6fefef59d9a225e747d8799f9e85d6bff818e58c54ef8e2603ff8. Chain 2 (Bitcoin): anchored in block 957624 (2026-07-11T23:13:54Z), 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/GBKQU2367565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f97bf989b786cb075749723816d5c0f8e4acbb6320f169819943906370595c. 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/GBKQU2367568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4220abffb29787d2904aa9107d043f6fd5862623f2ef1bf107253642d22e33. 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/GBKQU2367569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e80865ec55f3919d8f24ab2569fd96fab2878965f79fa03e975f82351e79e6d. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/GBKQU2367570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc0a9c74cba3c507a6c647c7075f107d7f8ad71f98bfda58feaae5af876c237. 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/QM42K2428319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb91f027d0f1c0dbb4d395ce02b3a299b397a4a95b571a2c5cad2c48aaec4919. 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/QZS632421794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09cb1edb6c4384bae537d57b1ada3a6ed8aef5172dc4a457b29e57a42aac784a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM42K2428869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7c0569727480ac5d95e6a8082340a9ada1fb61cd2b4d21a2f8f8c273308327. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZMHL2482411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa41e5c97d5f920514c5cc41ecd5a58ad3e1eaa7a2afb1c63f410db231d5c82c. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-21T22:56:27Z), 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/QZS652454703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ad677d1035b1b6d818ad8eef38b9d961adcf55fa1fea9034fe05b8be732290. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QM42K2405540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8748dedd4d8fef7e5d3db7515abcecbe7e8e1fb3f011575038bf0e6fd2a13342. 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/USYBL2401202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d6f6ea9f32824f78fa8b4e7a948f27ae0982019ec532a5bf553c964d2bb877. 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/USYBL2401204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abe7588927d5e984edbeac7fad97cc15258b13d85fe56449479c97c319d824f. 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/USYBL2401205.