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 0xabd2ae54270b7c58a9b9f8988a03bb7d4835d48b2e40921dc37844da46eaf236. 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/ef434cc2-0b91-400b-b07d-d8c826f9f369.json and https://artists.proofprofile.net/proofs/artist/ef434cc2-0b91-400b-b07d-d8c826f9f369.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 0xcb579452eb1e2ad550d61bbf8739d545dd45d0e4bb12db6e5a01aeba87ec3fcf. 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/FR10S1790404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c0ed52ff716aff722a6a3fbe7d88fda4444ca9a4c81783c2593e2cfe1260b2. 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/GB5LN1600380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438f175b991241ae20c226b0eabade8847b20839133542a701e1e1e10e7e3ba2. 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/GB5LN1600381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131316383f7b043481a4361ecf3d028e87cfb800a132836e5bc4ff4301dac645. 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/DEOE81410103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b63d0b589a24da98401139182e7fa661c8b2f6d61e03fdc09826910e45e6548. 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/US6680915592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fd79c9a04cbe8c4014defa98621d322be4084009159c5e468f00ac21b72729. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/DEG932100759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7237ad4dc7b8e4e1b392ca1b0e44b1f3e9f8445d70d621a1a5b425ef1ad4fa58. 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/DEG932100720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0de0833db02e809713361570e5df158f562658542ae8a3bdec3dd5d5febe2bb. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T16:21:10Z), 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/FRIDO2210813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01fca117cbf71a88fb65dc29238f209f9bd8f44a6e6e47c838086ab4eb7d9523. 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/GBCKB1500120.