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 0x38044f50a1e3464ed39f9b05ef53e3aef0ff38a91199a38351b5c100e201b8bb. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/02d6d9cb-1d5b-48a4-9cd5-38ac7f778a2a.json and https://artists.proofprofile.net/proofs/artist/02d6d9cb-1d5b-48a4-9cd5-38ac7f778a2a.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 0x0bb9a41166c799441e25d990c1ec4172ee33b84d8843ff0caa532b1c6ce9ff6f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NOWAT9601020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4b6d4eab43f618e90ce3ddb7068e83f69d2bdcbaeb0e5b7de5b66f9d8333d0. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/NOWAT9601060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7950a51f9a5fa569c9b7dc4b1037a49910e5ef339fbb23cbbebabfad5324950. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:03:50Z), 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/USTC70848402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6063d833b1e320079b07548d9205cce15c84263aba986de1500ea5b89d78d551. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:35:30Z), 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/USTC70848417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b350cd4aefcc03c7c1235d2b7d63755d6d36dfbae7066037991069ac4ae952. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT3F32409540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2c647e66e71dee8d6e768478c9d3dd015b32402f3894dfcb133dad95a1fd16. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOWAT9801010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c84059617fb9ef1fc555d9fb0c1d8bceaec9cdc56a78d74d66c8d606ac90a2c. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/QZTRX2338317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd171c039523dd7a6338fd96b43b2483895d5a7bf702330c1fb97d1801e7c009f. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/NOWAT0905140.