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 0x07525e99d8c692b23bf30f05c5f99df2e324ad2542f82f9bf9f22e847e945cc5. 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/f9b9b3c1-1a12-4736-ab5a-8c8f7e5f388c.json and https://artists.proofprofile.net/proofs/artist/f9b9b3c1-1a12-4736-ab5a-8c8f7e5f388c.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 0x122470e3a3ae6f7f8436b5ef27dc95d1cf524969c68a9ac03f630503ca7f3467. 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/PLC062225024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa762178479e959d0fb12094adc801b310420db84e377e5d159f89334a60887. 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/PLC062230304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6240e95025ab7ce2f6e7c668fb49e4f48c3b9ec8b61df5fac4b08cd5a91eb4a1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PLC062225026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7955abeacf590072be72c79765969d8d16cdbfa1084dd2ed1ae14ea70ec66a0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PLC062230306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122470e3a3ae6f7f8436b5ef27dc95d1cf524969c68a9ac03f630503ca7f3467. 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/PLC062225024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9080f0c365fd43cff094b3c6ee9f1543bc778f5392c0c18771f6de1d9ab956. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PLC062230308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6212422b4c9effc10ebfbebe59f6aae2a649e668bb90bcb18ddbd9de0dfebb3a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/PLC062230309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96422c099b9284c8119e25c855e506f11ed003764da0b7f853c438a03afba20d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PLC062230311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60fa3c71fc42bf52f4d352731ce3621ee2f8268a4f0db8166f1e59e5cc4d179. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLC062403498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18add6007dc09c4d5d89afde26c7701b61fc840de7af36c4e70abb33a5c711e. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:49:38Z), 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/PLC062422224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ba963772b888fddf506f64dbea4f52a1d39bb58c3930c2e49059383cdddec2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLC062437911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05289f5fa91dbf5ffd98416cf1e4d0839493f59854cf2df50b79cea123217ff3. 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/PLC062443477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d09ab987282fafdcb8396f57fc382a6bf4dfab442c0e1e64121261b39f07be. 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/PLC062502821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ab8f8284eaa7cb7c75a4a7485859ab9fefff760391be5bea3ff5db69340974. 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/PLC062383041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855dc639a613535f52f38caa26a2ce23933fc61212ab81d8b26e2728cee867fa. 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/PLC062443310.