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 0xe7092f4b59bb9773d086ba43625e755c26fdd2f567e4124bcfbb8f0e88daaddd. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/970896f7-d3b3-4d08-81db-f830aa837682.json and https://artists.proofprofile.net/proofs/artist/970896f7-d3b3-4d08-81db-f830aa837682.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 0xf913bf9f3324aca39cfd0af13b73cc2078a8eca6a43cfcbaeba31d6d8fe80d04. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USA561461314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0013483db9bfdb76ff3fcf3051e48fe3ac9d81ef4a1f9d1f226bccf93272bd. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/US3CR1501110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b818917a158eac92c45772cf096497fbde543a4d1efdf125abf7b0db18cc981. 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/US3CR1501111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21dc556e9cae384c973e2a546a77d5f3fe9365adc35fd6b8e0ab461e42aed72f. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/US3CR1501112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4aee516f278df990853bf92111efcee2b2ec92fd64bad52bfb57a1e7461bab. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/US3CR1501113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7a254a96cde1899bd16d85745561dd1b9f81444a8913c95dac68845163a718. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/US3CR1501115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625c2ea720f97daa8553b5da10e50a51c8ffdac4b0cf4585bbfee09a16fc82e1. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US3CR1600300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb359a25184c83b13d7283caa3e589996272819eb8c92ce8eb19ad7947afadb4. 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/US3CR1600301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3662137033c7af87e9ee090d5da45b37c611e90d1147c2015d9461dc3aa4c4cb. 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/US3CR1600303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b1ab81d82e46e142161804712c6af15f9121e6cf9cfd7a9a2ed761957b5e96. 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/US3CR1600305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc3a12d94370eee835e7daacd604bc4aa19ca5fccf38d1d6802e4361918291f. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/US3CR1600306.
Voodoo Crossing A Tribute To Jimi Hendrix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca381e3491bcdaff504d10147801ea8db6d9308e7c3796d794f23f50bd98c4ba. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/FR6V80317568.