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 0x4abe826a02802f928aa24b7c720a78230a1832b4f9549501a3b364fd22d21aa8. 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/ffc7a8fd-b9c2-41d2-8531-3b4627acd223.json and https://artists.proofprofile.net/proofs/artist/ffc7a8fd-b9c2-41d2-8531-3b4627acd223.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 0xf12968445ff4ddd7963c561c9cd062635c41cb45f517291de6f37c802941c695. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GBCJY2200072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0a1739b7d87ae0006c424db5f145c8fb441963608b0bef64f462889e4c05d3. 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/QZTAY2452842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e0c83bde8311abe7227aeaaa34c0f05fd2f3fa9f7bbdbef50c265bd80c11d6. 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/CH6542364307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d6d8a6ce9d53729e75ddb7737ca7583ea1d97724e3fecd19a0621797d97c21. 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/CH6542354017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b68237f1c689f6bd58ddb2e8b28cfb429c21246a476f2b534ec77c37252ad5e. 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/QZNWQ2388981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40c79aa91b02cd493765f54a030515f561b8149e57a4dd83291caadbabfffb4. 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/GBCJY2300429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a89a1d0490525f54be7af9180830bcd264567690ddfc2ee33db187d3f43511. 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/QM6P42362926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e99b49d061b5a5e921d90635f9dc17e7b34c2b4e1845b538755d7727377b5c9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB7NR2320205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66ca9a1771784a21229a94fc71c8d1d9d06c72aa5b68b55abb495bb8721f168. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHN52383735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86971f113fad0196b7062d82ecb0847efdfb273c653c18a7a593aba342d9bbff. 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/GB7NR2328504.
Horizon Red (Damian Lazarus Re-Shape) [Extended]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90694a2427d48e9255cafb260a9d1b7f880b74699c95354087e8ac54899cf2f1. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GB7NR2328505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067b2abb6870026448adb60368ad3745852b42d8641e548e47a4c2105982cecc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB7NR2328501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400774a33df11ab18cfded74175eb2e8f3c45367367fe42976e4329004bdda2f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GB7NR2328502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324f419170c895db7dfdca0b5bfa8085b97b01405628b71125b81254af64a09d. 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/GB7NR2328503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc19bad554a78fa8a7b35ecc827d2d9846c5ebba72f9daa93fd693f8525e191. 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/QZTAY2293771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e80114282e64085e6d2e427ac3f78242fd35d66504d4b48178d052f3e3bfc5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZPLR2222480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2836537bd5b8a3a6582e924b779b0d43606a6681798a37540409777ad268d2a. 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/GB6LY1600956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819375b7f3076afe0c40dbfa04bdc44d1dc952d8968cae7d4cc5a6b1b59435a7. 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/QZHN72126219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3e13aed397da42384e97aad38b499ca9a6b6fbec5e042d3f045120b9cd66d0. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZK6Q2041087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3574f5aad1f8cf318ba3a282c4ff60a65cfd18cc3ae306d9622b44a933336bd6. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:58:56Z), 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/QZFZ71972379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0c52ac71912bbff3294cea8c49d58e0de2135bc6f1f21df97ed9108461d2f0. 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/QZFZ71972380.