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 0xe892ac3c67b3b0daff520a9a4f505599c2524f38222e23605d3c9be8e36bf797. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e90ad51-efd2-4ac8-9e8f-daed7953f963.json and https://artists.proofprofile.net/proofs/artist/5e90ad51-efd2-4ac8-9e8f-daed7953f963.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 0x4f97ef562b2781e2bb4ea06dabe08da09011e8294f561b49fc1537b5731d970e. 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/DEPI82501514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710df9c6b94b5bc3f07fd5ab562ef44768b664a034ef42b1d8092e5fec00818a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEPI82501515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c2363e14639244615be6e591ed929ec42f8185eda7b6095cafebad1c4fb3fd. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/DEPI82501517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a805c1ba595dbbd3ee4d283f3fd1af859e6b4996e9aa29787d3e01308243078. 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/DEPI82501518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002a6ec365d0c4df700c7c51e7652d69c9a3040b39887890d3c9e481dfa5d256. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/DEPI82501520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acdddae162dd7406093df6bf1793deeed3b6670b2d614824e80f0001be790c2. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:36:25Z), 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/DEPI82501521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab074edf2cb8352378ac4c28953bb69958c48017b9f20962f83d19b34a47595. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:50:27Z), 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/DEPI82501522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c003b2a1bf4f83d11256de9b98b69187a48ff8badcfe36e3e61eb9cf254440. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEPI82501519.