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 0x4ead533ab2a8ba0275fb284ff20fb1d113203d74846b9ecf309b4cdabfc7201d. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46aab32b-7573-43a4-ab70-c4ef4da806b8.json and https://artists.proofprofile.net/proofs/artist/46aab32b-7573-43a4-ab70-c4ef4da806b8.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 0x6ab59a231848d45df6ae957d89eb73158f105293193748b6ed341308546bccb2. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZZ432327257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266d13563ec87c53d70fdec3b9570e1af25cfee5b5b2eeb24d56916728b2afae. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZZ432307701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01025eb451a9160d8336f66137c485d4cd22ef72e1706690e8e56e7a9a2151bd. 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/QZZ432307699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692ead3cb545489689bb276f61c8b68e3d39b96da60d69b861230e0dce5fdfd4. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZZ432307702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce086012112fa559893e743754eae144a0ec969d87c4b8616c9aa0f947d1721b. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZZ432307703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc65bb5b31a97d90676fc7ac3c153da619be244f3800544fcf6f4bbeaa160146. 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/QZZ432307705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fc7dedee48d515a2f7e6d6386a862312459e38ac7d59e14d953472d70bd93f. 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/QZZ432307700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616b204378ab33ebe6f40d6719a795d30a78ba1fa07623e063a8661c860e85c4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZZ432307215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3b4a02ec17ca3737915c50c1ad2b1fe45a2a369b6a712a2c41c545db18850d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZZ432307213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249e996534f1132a5004ce2e510e2f6f804f27251be622d71a71cb847cbbce1e. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZZ432307212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cc474cbee5ee5ce4c0aef16e18a3615485462819e0877e09e269b396d75740. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZZ432307211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8cbddb22493771996f7dfea308d59f17758a22a5b9cc7d9ba57a09a57b9ba2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZZ432307209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61323de80d536d180e4d825735631090d359716d0bf770c6c7dc534d2406d70. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/INL412402279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44efef2bc46c6f7ad3928c6f90254038c58b76ce2c6d265cb87bdab53ad1c03c. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/INL412402278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca9944c8725ea1a09437be2715580635b124e639e51dd8f8b9fe9e27ad18990. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/INL412402277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7983d1e23b242c83d112f41e39406a08987c52c997decb2e10468545f62d42. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/INS7A2619086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeaaa222aeb2976890aaaa2bceab3566ce7b79c88c0497872bff4663a220594e. 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/INL412400531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d724ca30ea59bfbfd89dbf982057d71eb013e8bb397587edf903c443a48fcd. 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/INL412400530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f3e8e4826d06ec20f960711be44f2c596981d7f976ef9c3217e0e8f064670d. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/INL412400529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11a61bbca86dead91909b9310256ae1d5ccde7317338c9d5b7576f064c20dc4. 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/INL412400528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79359aa7dde51c2d91efd929fa5a0359cb4d18e6badfe24d352a0813dfac922d. 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/INL412400527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1b560e65e868dc6577aa1c5953b7c68db11fd9cf64d30eb6c1e0025906e4b3. 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/INL412400526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971bdc6e318fc47e40f189e4f81232a046671a71091b027153b786b898d0f2e3. 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/INL412400525.