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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3f10f28bd71f58b990cf0faf9542a2bb15db960ff6b9f2d21d2dffee970392. 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/173f6e52-ae8d-48c7-9cb2-a3c39971d296.json and https://artists.proofprofile.net/proofs/artist/173f6e52-ae8d-48c7-9cb2-a3c39971d296.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6049aba9ff29e37ea56127a924ff9c2a68c9ef4b1fe10ad82f4cf3a41451f3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCGH1564610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17d17ef2c96f02d269d87cc55b2a744edc101a1f465ae193fe59cef964b173c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBWUL2108060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00438a93f35384cef432592776e3bc2744e0d88c8aa6ae94b6d6d1977ddb83af. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCGH1564600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0949cfcc08a2d4e3c03e5dd9024db2ca9ab614f552c68eae614dfafadf90e4e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCGH1564605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6049aba9ff29e37ea56127a924ff9c2a68c9ef4b1fe10ad82f4cf3a41451f3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USCGH1564610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985a33e1d0bc937f84af60323225beaeacab56e58ac577dfd49a16b2436eede0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USHM21230547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252b6ff9833003f62169202b15b907f84f6c7e02e120e21f0ebdbee4dab7c776. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USHM21230534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00438a93f35384cef432592776e3bc2744e0d88c8aa6ae94b6d6d1977ddb83af. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCGH1564600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0949cfcc08a2d4e3c03e5dd9024db2ca9ab614f552c68eae614dfafadf90e4e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USCGH1564605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92718b8f2d1edd9f85cadb7d7f525bf5dd88780f8444eb9842ecdaca5f642323. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPD731000090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4da937a950df164eb10b61646109c134e5739cb54c0cf442e90433d815a75a7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCGJ1452985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1bcd886338b0992454500bae7e8ee4877caa85c3f97cfb7109445a6da47efd3. 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/TCAAR1050433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0690fd08ff64bc680a60ee1688223f9349d6b86712e4c304dd84d153523fa4e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEQ020704750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252b6ff9833003f62169202b15b907f84f6c7e02e120e21f0ebdbee4dab7c776. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USHM21230534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985a33e1d0bc937f84af60323225beaeacab56e58ac577dfd49a16b2436eede0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USHM21230547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f3079f3cacb8571b244497b36384b60c2d85721f755b992093cf20b2fa0a22. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPH491605025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2630f36048ad45f38cd5ae8581bcd7f145b2e242a13b7073fc68a23863fb40. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPP321700579.