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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24669d48d9ea392624db67fa46107884cf0e8cd28a613de30108801a0a0fc693. 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/3b604b7c-95c7-4a84-9173-a6e421fa7a9a.json and https://artists.proofprofile.net/proofs/artist/3b604b7c-95c7-4a84-9173-a6e421fa7a9a.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b13e42110d144e7c748b7ab6fd804feb3edca5d7c8d920afbd745a92ec6df2. 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/QZNWS2496845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20abb4c71c65a3f1e56173104f1e0ea5c7e6aaffd60db6e8d67cf6d25c7d41b6. 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/QZNWQ2444684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b48d73e89b8308ce92e900b5884ef9e5ef0d228942e35dc4cae1c60a02801f. 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/QZMEN2413692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6de3493a44bfdb3ec94e1a9d8a613df6fd657494c065a30e054633ea05c1ac2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZK6F2475630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05eaa7f589e39c4ab44de0a418a37398d333964c6fa4efb9ab22195f132f2464. 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/QZES72408624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b0c9616a5d2239a8c503bb54b78aa63f629904e3220c97d617868ee855e623. 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/QZDA62416109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af34f54a9c0417ae9014f12376fec3b96f6eb844068a4fe27424440768a9a01. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ72492215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3356176fa03ff2d70eb69ca8596609332c8b886221909bd836c3b2a105e6c593. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTBE2328180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a29d855ffbbad9739702cc1c9f1f260c18987da377bdfd91e4a060cb408e437. 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/QZTB62323482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9797fd34be49d269b9fd679673a6c39034bbdb264bd8f6911aae3ab073b17564. 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/QZRP52379413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72dd29de42d51c393a7834c0ce8b027434634f035607e0cf5bc28139c41e4e70. 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/QZNWY2398643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40f2085c1fee27408f568a75931e0129efd8ec298254d3ebe4f71102afc714b. 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/QZNWZ2359937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5190acf7bbeca5cbaba1745d7ee686b5456277bb9d21f9c71d34ca5ce28aa9a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBWUL2362292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727e4d9d6b02ae1ede8088610b11d0c199d9e6f2d760e825f32268a07eee0b89. 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/QZHNB2321292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76bdb8eef6e3940026feb1f14bb6aeb9107eaa2ad23e0b62d055b716ce6d9e8. 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/QZHN72249585.