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 0xfddcbf3f03e4167fda27acbb5e65d88ca6b1cb0f82b64b98dbc8b68f8e0a78c4. Chain 2 (Bitcoin): anchored in block 953857 (2026-06-15T23:34:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/02e96ec8-12fe-4a4f-b35d-72344c927dc4.json and https://artists.proofprofile.net/proofs/artist/02e96ec8-12fe-4a4f-b35d-72344c927dc4.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 0x5b806b2556692b91209aff75943b7ea5f0df1fa0e4e85d9e309335ee28a3c8b9. 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/USHM21964285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae42c88a382d055a9b2c54456487f155b3b421979ece56cae3e1cfdcd3ad48d. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USHM21964287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3586912aa73902788c6e997f2f8b54f5d2ad35245b86f1a213c21073e67be003. 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/USHM21964291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd956367203f31138da7be75380faffc2734120c5e46d3f038acd76f2dc2ad3. 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/USHM21964292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d849e3f634f16d5a819d4b191261bd01a82d53fc3c5099926931c7cc925b82b. 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/USHM21964294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e236fe2e8e5b45dd700b6abb7ba21b293b0c20cbd04b716f6c60ab0329c2d1f. 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/USHM21964296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540f38b5df5ecd0962a68b17a7631c80ecbb7fbc2549b022c06b146ae7b82f0d. 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/USHM21964298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fffeedfeca924d27a0bb8ad2aea8593ebacf77c36269d3010026c98d3691cbb. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USHM21964299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08163dfeeb1aa07d3c6d7e3c33dcbde71a4e5355b4104ec52147a1a3c8fbfc47. 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/USHM21964300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf775d4fe0e27578ebf4d0eeac56f8dbc92a79c20fbf25eda850d7b301c0c1817. 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/USHM21964301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf835448bf161ec804b02ce62f53f1c96857bd17eaa0699bf6ca3c85e5cf26ac8. 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/USHM21964302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc352c8111ddbf7c68c75be4616b594c07161ff020fc0dc62a7f44c0ec7074d. 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/USHM21964303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64544e135b58a6404b06272d6aa4e56556a999f26b653af493efefc36f4a635. 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/USHM21964304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1533a9d9a92717589e201df6e47b3a4076c251099e181e9de3e1363377faded4. 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/USHM21964305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13eaec568c511cddf373bce2c6bc1af3972f3ee3c8b61c013e2fd9ceccc55682. 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/USHM21964307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023d4510c0f3a2b1b077f7c4eca3d3b8888e6b862a7272aaf793fad4e2c8adeb. 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/USHM21964308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7710e9051ac116848062f60d955219f361112f28906ab1c870b6269209f21e1c. 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/TCADT1835489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f55fed5b89e88fd648ff1c654d8a7bbee883e9cb8f4151be6a0cbe60cfce06. 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/TCADT1835491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595f83b7969b7c8ce37867eaf908efd8bf4758b48e38fc86d2ed0e53e4f73760. 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/TCADT1835492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7060a92264a59fc1f1b0000dddc16e008ed5170bb997f3dcd3af64d83895bc. 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/TCADN1882071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833a555e016d59689cbfa63d25af273328d78d5a59e7767d1600ca22bf57cada. 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/TCADJ1731451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5dfd41cc9bae22111d782d89d18f0992bc910362b20087e902c751f3c824774. 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/TCADT1835496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd1c657aed7fd399e9caf97c85abd8be2b88b60b7110c9450bd9146f6071a29. 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/TCADT1835497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4af672b5c61a4ff769e00e8a98cf1a1e4f542c6f21533f3c8a5e34e68be042. 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/TCADE1708172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645022c42cce827fb4c95dbf2f7b04ae916226f82523eeb86162c8bd145f85ad. 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/TCADP1807616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd83536ed8ec39e1c364e303eff1cb3513351a6bd04beb795e6e69cc9fed4c7. 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/TCADT1835501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a760072f1f38a07f86f6078a992849663c12fb3acf083a98a26b09829a1ab8. 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/TCADT1835504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1036c0b56fa0c5c39887ab96cdd158036ecaa7682fe7c408e3d54b98d3fb087d. 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/TCADM1846404.