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 0x1f2633cdfc15db8038fad9691d129954982669c663d33151d0967b1f3016ca92. 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/0c9cf824-136b-4736-8571-1baf2c746605.json and https://artists.proofprofile.net/proofs/artist/0c9cf824-136b-4736-8571-1baf2c746605.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 0x42f0c62ca3fedb2089a596cb9d28bdf6588780276abddeae3253f696fbe6b2eb. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/DEGT80900141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a2048d59273c05eec9608037defbca82e7194b3033a88261dbb5e30e2aa0f1. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/DERX61700204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2c9c90fca39e5867c95ba91e572ec8c29b8f4069270f7c0c2d29fc575d73dd. 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/CH6542328682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c02a0795288a2537a194caae3e8ac09e30c469ba2f688e55dc253da160a180d. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GBXWN0800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76ca42440d134873138ea820b2ae0dde014fd2e63e3ebea5cc107109ed987d0. 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/FRPGB2323850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4032b5070457ca7e19d3f4cf3abfd348732f2c729cefd1623f6af3691bbdfc2. 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/BR8Q01900067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73842a48430ad8f61244e6468cba07f03f5816960a4dbbaff54e8fb4a98855e8. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/BR8Q01900033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8b8d27842d71bb4553e45da9e95581fb243aebda2dd9d476306074aeb5350b. 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/FRX201828122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e51b15c2f85dccfe6ca7558cd7d939898af7a8301dfd70ab28c14c5d3cd6e1. 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/FRX201828123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618ab20205fac4b2f80b4b95e300051631436a02f0bfef4bb7d953462bf4e131. 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/DGA0M2361209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b93e58bf9519e30ab2b17cdcba1a1fc53db1f6431a3f9d7febf2f10c2df1879. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USJ3V1306870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa62b4d7ff823b6cc62fd4adbbf4e242cf76cd14a455df96439bb63c4e0b430. 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/GBNJE0600109.
Deep Roots Music & Dub: The 10" Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdfdfb84963790bb45f83c569d68ca40e6934720b5e3cf7ad70047f44baf6ac. 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/QMFME1492700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d22771bc2c40e04f41dee3b080289e56ad0d61a1245667f4b9f3797264adfe. 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/FRX281923439.