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 0xe02c63fe3e798cf1918729f8e16dcfeb4482533947ac9af6952c805c3e9c4fdc. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f1d1b3e-ec32-439c-acbd-fc1c8d5bb215.json and https://artists.proofprofile.net/proofs/artist/8f1d1b3e-ec32-439c-acbd-fc1c8d5bb215.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 0x7b0ba540dd1fe6559568404023c0aa3493bf400bac2ee8fe42f94e98d2e84d38. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:03:47Z), 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/SE57V2411955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30463f704efcbcf0db37993208ed59cb76f43701270401081e6cdd6a8cae9a0e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SE57V2411957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9646856342718601584b403e53ef31af71fe9ba011b66480146878bb4668b286. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:12:01Z), 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/SE57V2411958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f3f126db82332da34749d7ffc41837541ba5561e7ee4cf31ee7eef514211b1. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:09:50Z), 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/SE57V2411960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587fdeb0805e8dce442a8557635fa9aea313d103436439749b5e4049bead0fd5. 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/SE57V2411961.