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 0x7876ca7ae519cb7bbe07f90c70b8620d9c12a80fae80e8838dcf94c57400d2ef. 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/b9e3ce4f-bdec-4b84-b4a9-4ebe699945a9.json and https://artists.proofprofile.net/proofs/artist/b9e3ce4f-bdec-4b84-b4a9-4ebe699945a9.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 0x0e30979e6d8a277f109f4bed59c4a574859952a417ac6ee85cf89ad8d1b54c57. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLI291800041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7941de34ec1f2dc61f3ff81608906243d40e010935828c8108dd8937e9759f0a. 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/PLI291800049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece10be56ab3198a32f1901d67c9e2409fe38c0f826acce159ba8650d084bdb6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLI291800043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56072735c4099810f6a04ae12bb2d80ee3b541ceb9968522cff676a89fbb4796. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLI291800046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a11005500809b966b9a19d765d5879a1c01e76b559eb8e4eadcb1d0e2111124. 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/PLI291800042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece10be56ab3198a32f1901d67c9e2409fe38c0f826acce159ba8650d084bdb6. 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/PLI291800043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e30979e6d8a277f109f4bed59c4a574859952a417ac6ee85cf89ad8d1b54c57. 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/PLI291800041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f99d850e32d37cbaa27c630f99d4ff14d7f5d9b873f66a90bd448c18ee6a8e. 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/PLI291800044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb259f0604f20c49b0087d6f9685a63387cb9a7aa1c403ec6d84528781ed3134. 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/PLI291800045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56072735c4099810f6a04ae12bb2d80ee3b541ceb9968522cff676a89fbb4796. 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/PLI291800046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672831cd6a2784508b50cf14541c97a21cf1162d982ce747dbd536a9f8401826. 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/PLI291800047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02324c9d5cfd7f5b5044d82248b2f26506384f750f342ca103700456fa12524. 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/PLI291800048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b0ea05980373e8c722fd9ce62538366628117cf5012a9becccdf4d53f7fe20. 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/PLI291800050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d24b6be2fe95b6806e86b642fbf72d802155acfb9102d46a84649095546169f. 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/PLI291800051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf656500a29795f2730952e767662e7496a88a8b21750238e9c0a460e8264252. 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/PLI291800052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e2a121ec185b910c49ece97a95dc76cc90984c05fc1c3b0099f27d437c7107. 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/PLI291800053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe6305a77cefb0523fba029ab20fcf16c360455f1cc6a2baf7f05c19fab7df0. 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/PLI291800054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca83ebeb61cda4f916cf82928900d76e78006eda46b6605829e71e1c4b83878d. 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/PLI291800055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824e9cd09c0fb5c4f6beba3c1d1258edc3b2349af90da1edb1bff36dde08ee87. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLI291800056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad2952b447d7b6018d15c96f32ecf32f880c0cfe555e1a40b1f560a61b01a69. 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/PLI291800057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84eb8b9634361ce9c253de07652073b47fda10640a2d4ae546e478b440867345. 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/PLI291800058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54548efa32967d0392c35ff85814c6ea6625265641290a666b38537ca9bcd5db. 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/PLI291800059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7e0fcd66eadcaa7432e3a77160179d90f4557795dd21f0bbfbad50c43718dd. 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/PLI291800060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcb99ab6c392fad187d94626f81a6d483a1544d55716eece3345e5772f24c39. 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/PLI291800061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c63bc81f92e90ecfa4ca589531ac41244e3167400898aff08e7da1ca8e79e7. 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/PLI291800062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a267fc5843957c371b876f3e1e2cd7d87a8366184a3034a2f60e1b48621ec9a. 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/PLI291800063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e549c78f7f22496f740e1a9f46e1644407036ac3040e45fa1fe8239f523a26. 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/PLI291800064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7129f30cc1c72c0ffbcfef57dede79b453261f2629abc50f8e9a78fb06c19395. 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/PLI291800065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b639be01a188c8a1fa5c591d580d5fc07f18de7f99e06cd138c9527cc452ebb. 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/PLI291800066.