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 0x9ba81c56d283d5a1b3bda6a9a7e2d93b54d9ff22f3156c886de388a01a974b69. 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/9867ebe8-1a9f-4d50-b74f-6f558c157369.json and https://artists.proofprofile.net/proofs/artist/9867ebe8-1a9f-4d50-b74f-6f558c157369.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 0xe721899af802ab672d8c0382d1a3aa6fc9819f1dc7a0302ec4f95bf56fd35bf9. 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/BKNNO2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0399d37acd8905ba348f306114e38b0ab9ff2bf9a662a3a968b744bbef8a0351. 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/BKNNO2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d664f165049cf20cc999e5ec8e9570c5092e78aa8ce76a601cd9c062524afad. 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/BKNNO2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09911a29f2078c6c5080a471abeabbe6934764e28d87d0481ddd9cf7fe5e4b18. 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/BKNNO2200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1758198a2552c134a051f194a0d7cec2de952f823f3e535fb668ad192104613d. 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/BKNNO2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fef7f2ceb1d962c4940be85b982043098467e41403ff27ca1f9b8254eb75e6. 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/BKNNO2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cd415bf418a4f51c1b18aa2f1ebd2980d518a1c8bdc4aaa66a19f4a654f7e6. 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/BKNNO2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4d1a2d7375f50755a656550a2fd34890e0b70801402f6bc082ab8eff91808b. 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/BKNNO2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf288d3cfa76f0be3c41ac3f5a50025396106304a53edd37ba773be9dc96c708f. 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/BKNNO2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f97ee697b49cad717cde82b52f6954b19b754226dc86ed46d6eb83eacd12d77. 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/BKNNO2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca73d7019647271739e656453c424be98248050d3d699b591008dbb720d60a62. 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/BKNNO2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40f8578a6aa5ffa2f66dff55c4adceae9c6d8904ba85771fe3d612a22ffa99e. 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/BKNNO2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f521ab4c8a7b074b6839f9ab7a999915287f275fa24296a85b6ca1c75f90fa4. 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/BKNNO2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6d5214d8474da894cf83a8501330f847fb97b31ef23a5753e0c7338422bf1a. 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/BKNNO2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c5aa37085493434bcfef3cab463ae7ed04cb3fd8dcb3c2d615cbb1aed3dc09. 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/BKNNO2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a44dbc7a9e9741b2941bc8de45668a88016a1b0a07af5cac2720938abef43bb. 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/BRWMB2300119.