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 0xd37bf252c9848e7a2f5964a8c01e818d128ed34255f6e8e9f60c6a7eef52e613. 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/4254f84b-f606-49d5-bf46-3cb335ba2c13.json and https://artists.proofprofile.net/proofs/artist/4254f84b-f606-49d5-bf46-3cb335ba2c13.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 0xca90bda3b367b1d7c539e25df092f8784212a4e57c1ab93b78290747ebf822a0. 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/QZWFE2368602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f82ced450f8c1de217a130ef3bee0070b071e6c618f06ee51c549767750639. 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/QZTAS2342004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ddef0881965d2a48fe4799e2edfb69532e9c6dd7b2a7437c6373b6f96597d8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:55:54Z), 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/UKXN22447342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888422cd5cf8fc11c000921c57bd6ba0b66a74537620b1e2a977821511d0f69d. 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/UKXN22447343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4bf64b4eb05b33f202aa5cb6f85f828e2f1e1bc6534f5f221be5da11a14a8e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKXN22447345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5c5c4f24aa534905ee8433824f6d12c48a2c793cb7f6095b545109c8c79d9a. 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/UKXN22447346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b03a6fac8a04e0c0c28bff12501a9f21b59fc6ec81243512570702fc3aecad7. 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/GX3Q92428201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafc0ad8ffbc183b30af9ddd73b00db75cb75c2fd035ecad2cc79b8176230b57. 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/UKXN22447347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cf304edaf49d2d48a683c53a2666b0b2cf8492589b17aec10f0b03ecb58de1. 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/CA5KR2532829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1261520c2a08afbb4823b6b7b5ed8b97488af045d5fda876bb2a8aecd2a283d9. 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/QZDA62410492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c8ee5f043c1fd3b11da697e691414e077c0550093f3c044ea7ad30dfac32fe. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWY2352758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930250df1e8d4f0e91cdaf7d08191905dedb5356f75e1645e33f3efeb4aa25e1. 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/QZNWY2352759.