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 0xa80206328d6a1d5828d848f1421f378be8c540bf97c247fa6db9302a2398b972. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/11303d6a-57e6-4eb0-bc70-52618b39dd34.json and https://artists.proofprofile.net/proofs/artist/11303d6a-57e6-4eb0-bc70-52618b39dd34.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 0x2b04334b20b19a1f3cb8e2ee0663ec47dd3d697a447e0478b71bc27ed78de2c1. 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/QZWFS2449791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f61f7a37907e27e8d9eaa10b089eb1565fa77066c3a4088965d2ea6cc13e48. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:41:38Z), 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/QT3EZ2468535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cfe3319815e9ffa7db687c72d1b710cb455e2b286cd57edd705d9c3bcb1753. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:20:24Z), 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/QT3EZ2468540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc995f99d4a930c008f86c20aca71c63a549f975595500268e751b43304007920. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QT3EZ2468542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2192deca15f5460c7122c98de4c240fec298bf228227ca21ff61f2846a0d30. 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/QT3EZ2468545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0513f182935d41d842f08b95b40f24e054ae43c51d9d6b58ef35e64bfa3deee5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:10:06Z), 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/QT3EZ2468550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94131a6211910ee33434a029b2ad1cfcc99d952dcac2a423834e75f54f503396. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QT3EZ2468551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc338ce17e63c2eedc955799154b1b0fc7ee3ff97aff4ba164c0591f12a0d2a67. 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/QT3EZ2468552.