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 0x28b301f995d0f71bfa2930cc1fa7a53cabd7da366a0f726e121ce77b7f2d0e9e. 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/58a663b6-af9c-46ef-b012-22b6f080bcf8.json and https://artists.proofprofile.net/proofs/artist/58a663b6-af9c-46ef-b012-22b6f080bcf8.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 0x05201f4c34600cfb459e5027158a182b816ac7fe6c608b2eb845228ce1979dda. 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/BCMUI2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6941b22cf27fc5f69a7aecef5791e48784294174389f1c7c77f644615852851. 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/BCMUI2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5a3d62eadc1a1f88318f9b055d3a2c1a04318f2c25ee26c8b68bcd353f5ea4. 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/BCMUI2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbe975672f80661388c51a80615e90c6757c8fa26aa5ae3189d4bfa33cb95ac. 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/BCMUI2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d78e34046b0643f6675b0dac3dc5e1bfd342ae106c5c8a9fa0a9a72425aca25. 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/BCMUI2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3317c667e3739c8304fab97946ee5317786844fa7d6a0ec8494f64ccd03ee59. 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/BCMUI2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a70ca1a39768c7b8fb12cc82e8c4f0c914b52f6445868766dcdc421a84de24. 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/BCMUI2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea426d76461e152692abd0b83c79d9cd3766ad9b95692527a0362ccd852b186. 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/BCMUI2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b669a1586f778f4d9c0868998e5d3a92f01e2526b3f3934249abdb68a5bab5. 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/BCMUI2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb187b36a18b6424ac22f47e35ca1d98f669a3ce5d0025ee445518279d48f460a. 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/BCMUI2000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c46409d85e0689da33f545ead5b92f697837ddf4fb21feaac99664786993d9. 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/BCMUI2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4ff70beffcd5b8378a800318cb0e95eed11374b6276cfc62d6120a794e921c. 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/BCMUI2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f08edf8ac5c8a396564c07cf45785f3db5472b19d51d89411e288b00498ec06. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/BCGSU2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4aea09fe219f9af848b3495dad283aaa8fb526e889ef78671a62568070268ef. 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/QZHZ41920918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505f7398f56b03c8afa423af051a84ae470bbad656b82686cca7453db7022107. 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/QZGLS1942323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c7ecb1c03c129c63dfb956d59beede9144050d235f564402c6c375681cb116. 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/BC0PG2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9e6c73375aa6988d92a3b496b99616c4332ae3096ab16506c2ccaaafce3a7d. 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/QZGLM2076257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdb1d5bf811ae4f8c9f1a9bbc533b76adacaa628a9d4e406d1607c44105764c. 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/BC0PG2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ae51e1b475a9ca3e7930468085216d5d3c47cd8f474787ea3e00d19ca2467f. 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/BC0PG2300013.