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 0xde3dbad431a6f29578da3a82d116a3e43556a949084a3066774606c634f25990. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0ebc4ea-584a-4425-8870-4b1de1e1575d.json and https://artists.proofprofile.net/proofs/artist/e0ebc4ea-584a-4425-8870-4b1de1e1575d.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 0x829b0684f54fb9819236a19846437bbf67a4bc30aa3f35cddbd75a1c61989609. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:45:28Z), 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/UKHJ41900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f86485f8ab0a4594ad9d927e088e2b9993c53610be565e7fc971def2d50da48. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:29:50Z), 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/UKHJ41900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bf21b9ce3e37ba7732e57dbbaf085fb05170fb87f312920216da805fb01678. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/UKHJ41900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c3796f9d9ad5350e5d3db26de018fb78d42175fa5471d7838c45bdbde052b2. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:08:35Z), 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/UKHJ41900026.