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 0x38d8f18da0af0b02e83db97f0694219a22c488732e9060856dd1b682f3aa1fd0. 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/f6a06543-efe0-476d-ace2-d9f9c3063577.json and https://artists.proofprofile.net/proofs/artist/f6a06543-efe0-476d-ace2-d9f9c3063577.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 0x748b1eeeb9a4997b33972df46825d5899ddb8d2eb5f6ab457223576f8be72a04. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZK6L2137160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d763293f60db5cbe847a54093808b312143e19b28106de4a4ee9c9f93db74ee. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:32:22Z), 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/QZFYY2259535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e912c212db2f8a7661484363d69727938fcaeb54779b2b34d795dfbeb0fad98. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:54:04Z), 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/QZFYY2259536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790c1edc61ada8d533a5669d20af5e29fe2769e4282def9b8483a89c23bc0645. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZFYY2259537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41c30c087461f09cca2795bc7affe68e390202210c25fad2913b90e0673fe53. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6M2213708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3c0dcd741fb80370aa13187e0dad4b1de87651116d8f46fb1c32ed4451d703. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFYX2337391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b550e91fbb393e3717b36e0ad2807a90f79815ba199429d56d45541a72e696. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/GBWUL2380260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbee3a00ffeca3fb601e2136a393cd8a9ed4fee767d0041d76e04ee5389ca399. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZNWT2477238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430c18fad8345eb67facf2e6f262eb250a8ed2f55592b914a7b79254fe0ae2f9. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QT3EZ2498363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3352d414b362a6e6115b6e6d624b22c894b0b81ba7b0c6b226fd8970db3a2c. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHNC2590459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627b50841b42a3bde644568c347505f884794d49acc7e3eff4107a602f0a51f4. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZMEQ2561557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3fa910942d4e664a985641d98d5c978dee961e5a5b7971e0de5c641b914b1d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTAU2523829.