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 0x86e2edc1e74c3015634fa9f75142ae34e846aadef20f9b81fd69b4f2ce3ff13e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/486d0578-8ad9-4a3c-886f-c3d4a3eca7a1.json and https://artists.proofprofile.net/proofs/artist/486d0578-8ad9-4a3c-886f-c3d4a3eca7a1.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 0x3eabc8aad9bd803d1e31daef266c0093d26716ddfc8b70c49ac474a0695cb38e. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZPLR2072464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21dfcf605404ced331bcb11bc9ece809d6eeb7e55783a2c7610857428d20635. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZPLR2074677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf785362649ffae8d1a4b03c3996d4492b01a9e739ddf9fc03eed3a1c2bf706. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:47:40Z), 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/QZES62184640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9bcc6cb3f2319e5008faedef7bb368bc638ec8b83f267e1e50b57520189e2c1. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:47:56Z), 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/QZK6N2143886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812900d6fc413af6c0cec4c89b5b588b08a674e11cb71025112682853439478f. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZNWZ2185011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d48e37c2d5f7e9553f811a21d4bec77d018068368761efdf365a72281332a9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTAS2102716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2b8e958c03a6769ee0ec9bc469721cbbea477b316271da26f6fd22dd73c2dc. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZTAS2102717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49548456ccc944de97a27b7466e7b63c85b6b189b32782d0439f78e6b04d02eb. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZTAS2102718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9a39c19e727a165407a17ff9012117bfd40a31b4ed6acf6d49b14e1e683aaa. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTAS2102720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf6d88b29d5b4fe4b9b92bb7dc852b8ec3c6d95542a882401e9fa0ea2e5ce7f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTAS2102721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d905479cfe9e8dae6316769e576e744a93452e9db37635f19848a8b35ca8840. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZRP42164768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c91207d8e25f396e4ce0b4219870fd80f3989bab338a65fa91a62742ff5f748. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/QZRP42164775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a088fe5ec65dfb4ddb6e44f3b61e35d6c0a1a4259faa7932c75c660e0e640c3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZRP42164784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d030ba552ec0641a5396d609d1a448b1c582389391933641df4e386af80c31c. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZHN42249733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf503fbecd70e9568907b621b43c2abc35725c8344bb125f48f6e07022129031b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6N2270252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfa57a3c7d01462a5faddedf619bb503e8bf7e11541cb324d6e2fcd2453b8ae. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZK6N2267042.