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 0xb76cb806100a07aca76b0648059d98c56ac10e2381cfe4a75d1c42ca33859eeb. 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/8f997c45-1bab-4f21-96e6-ef2653c5442f.json and https://artists.proofprofile.net/proofs/artist/8f997c45-1bab-4f21-96e6-ef2653c5442f.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 0x030b5b52d037e2a3205189262f3b45bcce9915a6945102d16761fab5dc53d6a7. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZPLR2092904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6f7c01882992e85f198da8f9beb70bd178b166ba92d4d710cbd4d98bfa0e72. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:49:59Z), 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/QZNWU2205165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c5ba48f32d9fcde9ea9150157c0af86eaa51e13c834350332c85f593e21a2d. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZFYX2485636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e051fed2dd05207bee6b6c4e355955254bcbd2c7ed2f3a4c67b2dfe476a6df8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6F2444085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80924b2d60c713e5f6ee7e07b33496e37772bbe3e9161cf051e82edde7b98d27. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:05:31Z), 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/QZTB92412244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0103a89bc15022e43c0b03a669e7ecd925f1df265e36c39991d224662a61a2a4. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZWFN2498155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73af3d6e8761c09760164717f5c2c739ff662db139a27856c039304aa0859b6a. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZFYZ2546250.