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 0xc42f0d81df85295551613fa81447c6d192fd33f9c9eee19e4c75cfddd8ee1a94. 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/24c46d92-09dd-498f-9ed1-425453932a55.json and https://artists.proofprofile.net/proofs/artist/24c46d92-09dd-498f-9ed1-425453932a55.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 0x216b94549c8171d5fde804ad8be735e53fccafb200875aa307de22279859f91f. 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/DEY472370399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78cd469aa6722441f31b6cc690cf0569c0794601a4d7bd9029b2ecb3d3e9f71. 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/GBKQU2460330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c7567077f81abcbeb8a7d58b80bd00b728c42adbe5ed296073848d525f11d8. 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/GBCPZ2321632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2e7df76a43ee9773b2dcd0d01ee746017f30ab14638436bdcbb6a747ea49d9. 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/DEY472176502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d6ef30637c54c10d762ebe4853ba75d4f59752b3db1f90e2291046d69c1d46. 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/DEY472171971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b4060e5dfd5d981fb9cae86a995c56f0c5e1f25970283379bc50f3dbbf4499. 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/CA5KR2141054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b13bbec0d4f9f001bce811d8090ecdcd4c80b80956cb21c45e8f9b849eba88. 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/DEY472081761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecd9c86a31aa4290496eb043d736d50f3f13800d45019b9cbb5b3a294217b1f. 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/DEY472081763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b1d381c40a9f569282eddd6440ac9e3585beb9ec11479293592def7ba522a2. 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/DEY471982200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7756ccd2c87ee0c7a5ab9bae69de7613dc014d80f13e538b5f6a8f1e520ed250. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEY471982202.
Café del Mar Ibiza Chillout Mix III (DJ Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5490e6341b96a91278b0de4835dc410504fb91304a876ca6b4f1cfd0b28633f. 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/ES8742303002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4649c41a6482903550faef33b896f83f8c99b5d014f673f7f412df09b1ce8ff. 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/ES8742303011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf3268c4952a504cdd013496c60881c91c2d89ad760e5f76d7f1717268ebb85. 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/DET980600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f93fbb9b2d29869225b120a774af7b7da7d0063f2e7dff2cd4eecf63ac2c60. 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/GBCPZ2423757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca30069dcc752341813b0066beab0fb4cf9d7a1f95abcfeba866397ceaf6e440. 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/NLZ542400382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5a9a32aa43c2901375140a601c21f9405035ba8979edcb59c60ea503981eeb. 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/NL8RL2409745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541234a5ad6901cbf1e209e755dac43c61e1d6f12ebb1c8d8af43f76f9970444. 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/NL8RL2405481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7388a11c451ae41af5664f894df4470a324dce4c766357e5681a4da6597aa8b. 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/CA5KR2441936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad89ed81a1bbf05c0f58c38eb4e704baece0e4b64fb76a94677823aae20c15e. 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/DEY471982566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d3f5844743a4722e35e2bbc2b6eada0f45b428c7cfa2859387fc3d3009cf18. 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/DEY471982567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffae816d2bb9e010657ac2e929069665023b209e7439475f72657ad70236a500. 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/DEY471982569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5f3ff394802e6e6380205dc81f7e978227fed442e738b6f3eda249c8ea87f5. 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/GBJX32264813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6241b59aedbe3c028b92feb3dda851d16e726fe4b19299eb6afba6be031c6f. 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/GBJX32264814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85688265a0a90efdfc383627830fc99ee244c5601eaf18b273dea4c28b8f2a87. 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/GBJX32264815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cac8ba0be2441b375949f89ca225d5ba7d5f6a2ce8fe247ee86be5421122bb. 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/DEY472378225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb4b9f86ee9b073535323615151e84c72f33270bb1ad3b8c1dfd196cb02d5f9. 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/DEY472378233.
Global Underground: Nubreed 12 - Denney (Mixed)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23bcec187091121eb5c48a8c11cc8d4582a8ec08d8149b481927015cabef62a6. 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/GBHFW1800164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe935f5ee80bbe23ea79b21e134419af27f92fcb13495f2109a763af17941ba9. 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/DEY471819254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15ab137b354d799ee126f31dfe7aaeafa35895d34fb10f9a31a6f5a3bc53df5. 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/GBKQU2292345.
Defected Radio Episode 070 (hosted by Sam Divine)