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 0x5c74d0e8e5bc029a9ba5793003b52ffe3302e10eb15def03bf541cdaf8556a82. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e73b22a-83d7-4575-b4a5-dfdc00ceaff7.json and https://artists.proofprofile.net/proofs/artist/8e73b22a-83d7-4575-b4a5-dfdc00ceaff7.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 0xbec5f12d1ef5404544760919e5359c5de8458b98e15c397f20ab87c133bc0f1c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:01:46Z), 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/QZDA52082603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e04958a7d886365ae0552e81787c6eb1d14665f7426aa1edc0aa546d2374bb. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZDA82047398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ef46c2009706aaa82a7208a79f2becda52f7b48330af55441a10353cfbd32d. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:12:26Z), 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/QZK6P2133591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d65763c97f2f665fc1d5a4dc59bbfc25498b549560e3f793abf57e37d8b480d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:24:00Z), 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/QZNWZ2247547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda027d4bf35617f498ff835f7dd3b60bc21a8bbbd7c9fb74af8ed70c495f849. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZFZ72546652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c8a6c49b489d7cc8fb4992baba0449a30d0f82b21e26109f586180b041515a. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZDA62525754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4f6dbdcd58d2ee5e76e758e59c2fb9e173132d7f7598934646e23cdb2f3e4f. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZHN42532605.