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 0xdb0e9578a83d1cc84bb9af5f23b850ddbdbcf13d173028fe0f70ced74c13bf07. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/68c9002e-db64-4614-8a38-2a723519e061.json and https://artists.proofprofile.net/proofs/artist/68c9002e-db64-4614-8a38-2a723519e061.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 0x385986ff9f2a4c2d73d6933bcd17739ed82a2105ecd9a2dffe0b1c6b2e548c01. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:51:43Z), 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/QZTB22222901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6f7aaec5ef88eb9bab4fcacf081e619ac3ffeb0e421f4be0e4c5cdfd9635f4. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:23:04Z), 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/QZDA72339026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288987f36ea85c425f78bad2c475fc79409b4695765e3e091496d527200dc282. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZHN72399823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42e61b545309fec66a576d054766075d530efbd12b05a6267982011c8e81241. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:36:04Z), 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/QZK6N2475033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ca32fb262e254c5620fd50db36f1ec4351729d9cb8d301277e6e156c41e18d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/IT1O72501291.