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 0x729efa31c99fd9a6aa42532128cdb1e97f0525b5acf0ba0a38bdaee45adc4ca7. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1979ca29-a31b-42aa-9451-bfea582781c8.json and https://artists.proofprofile.net/proofs/artist/1979ca29-a31b-42aa-9451-bfea582781c8.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 0x1206812ece724cbf1c8ba56bc917e235a97834ab59b7920dfa7daa309293d8bb. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QM4TX1617648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0132f21b236fe7dd608aa9de44efd7bce12f6ce738734ed4318011a5e90daef. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QM4TX1617649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456ff4594a4bac39a2b9816a45090ef1370906372c4d681d92480cce71c22834. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:30:23Z), 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/QM4TX1617650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a3d781fd0414f39458a7c91081f304f2085aebb5a696e20ffb137bc92a797a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:15:45Z), 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/QM4TX1617653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9513adcfbdb7439f85311171400e2797da54317656c282d1b63574ab4bc809. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QM4TX1617654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47508a726d3d1380fd15abb258ce236d8c8fad477c0aa3668b0a06f6271cb904. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:20:32Z), 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/QM4TX1617655.