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 0x6c1ffeef8d4aad46be944d0968742860fdcaac6d10fec0cea43a3ad53bcc843c. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed419a30-1ed0-47a2-b4cc-38dbbc164436.json and https://artists.proofprofile.net/proofs/artist/ed419a30-1ed0-47a2-b4cc-38dbbc164436.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 0xcfa9193238d37de1d537b5e96ba963c39c5009d429c9eeaaf3dfa4a98c5753cd. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QZTAT2482693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfc1bea1cdca827f9347070a7a5b00b1a3549372afb50d3d6aa2e7be7fa9843. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTAU2490509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c0e5710c8ed7cfe5c8038913f8fb20ef0e744a89de715468fa4df002367230. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB52456215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c95d784b806df973b4712b1fd8431e4b376f03ebb06b7392510b0112c25c492. 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/QZDQH2434418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeaabce5179574f6f5e37632db92e7651f9c41726d3489e495b073a045e95a1a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDQH2435421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad62167dfc3e34f93be60139d6924f65ca86361bd6fb4043429779e2e086912f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:25:27Z), 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/QZDQH2444773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a584dfcc94adfb7ac2e328ebbd5216ac4fb27b29095554e3121634f3c12afc. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QM4TW2587531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f259a233691ae8afbbe4ac3e55e2ac481899db10a550a9ebd6c959128ddeea2. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QM7282552866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf52fedccd77e36675aed1d3634ec27ecd6f47617a2632271072b170a4a2e5f0. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:31:30Z), 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/QMDA72577544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed736e1fb578a91534bd9f2364d9842e67c13d9b65ead9d7a67e386871a350c. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:14:34Z), 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/AEA3A2072673.