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 0x8acf02a3dbd5489ece6f2162e6548fa938fe49a5541d3f52c6a79f2bf3196a43. 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/d1705e08-c304-4412-9c35-df6ab16f5af3.json and https://artists.proofprofile.net/proofs/artist/d1705e08-c304-4412-9c35-df6ab16f5af3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Defected Radio Episode 067 (hosted by Sam Divine)
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 0x3bfd3e7b2fabec99c3c26e05a898b3ae8ca86ca690bfa7a6d9df774ff4b1a35f. 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/GBCPZ1712107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401479fdeccce1f92ea970a3e8ba59ec57fa40d63acd4179d476ac17ab514f01. 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/GBCPZ1712109.
Defected Radio Episode 112 (hosted by Sam Divine)
South Of The River - Detroit Swindle Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46621eb3eed162b7c3296363e879036aa777918ea9408ae457a78933d65e1839. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/GBKPL1785214.
Calling Out (feat. Dames Brown) - 7" Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc53ca93ac52cd966e6dc3f4fdc8fc28e51d756ae540c5e97a373d799be245b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBCPZ1712579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5434914cbf3640becc9ef08fcb70b3a65db8cd628faa948ccac3b45dbbc45a6d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEZ651706449.
Welcome to the Jungle - Andrea Oliva Extended Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaade3fe2587838f4f5e465f45229aeff0bb7be5b9f20fc70cd29ce57946d98aa. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/NLF711706614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e141fe96ae30b9a4b1d84d0f3d2c62c2943f5f504e487cefb83ee6e4c31a15. 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/GBCPZ1712198.
Defected Radio Episode 081 (hosted by Sam Divine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a4677842b2eece80111561f38910d4db557fa8c4f9da8c68b12b7fe7e38304. 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/GBCPZ1712856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded15ad473eeb4362bebdd9363be112b2fffa903cbe072e4c3993d6dec370271. 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/GBCPZ1712873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad24d95f8218eed94b1bd5bb53116fa2f2c84784c670a058c7ab85b625880dea. 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/GBCPZ1916297.
James Haskell's Back Row Beats Workout (Mixed)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5801f3718b04e4a7dd1a279c0372e2165df2c9cfcbe53359b5126d7bbda40af8. 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/GBCPZ1712921.
Defected Radio Episode 069 (hosted by Sam Divine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed137c248897deaa7340a613a53465d223a05e7f2e986bbce210ee9230674ac6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBCPZ1712189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26ad585e9f64228fc2cda6486aef30caa34a4ce7a420183b8f21214789072c6. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/GBCPZ1712249.
Defected Presents Most Rated 2018 (Mixed)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfd3e7b2fabec99c3c26e05a898b3ae8ca86ca690bfa7a6d9df774ff4b1a35f. 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/GBCPZ1712107.