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 0x49a09a7008f32edd95d8e3e51cb69d50b1309c1160d71b00d7beebd80da1016b. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20dec72a-ffc7-448f-99b5-e2fecc9b2523.json and https://artists.proofprofile.net/proofs/artist/20dec72a-ffc7-448f-99b5-e2fecc9b2523.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 0x4aa426d98244e7fb33502fe4663662c5b7b019951f4ff056d7f82defdd1cfd31. 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/GBSZM1300243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaeca4a66f5b5a79b38f9704348e18d9e1888b9124175513df11a953994ab9c7. 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/GBSZM1300244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454010f15765966676fde9ba08594743989ed3606116ba17b5af96b4fabbd05b. 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/GBSZM1300246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e27004a9f57429d9f4cc1228f6486853da3e2ba84988a73c50b2e8e0584efd. 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/GBSZM1300248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4414d5a591c9334b629dd58c81369e796b81716d468b314a1e231daf4c4ee7. 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/GBSZM1300257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b63d5a9dd553efdb00dd5830ac4d47d0830765f97636ca6a9bc3f1b97858af. 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/GBSZM1300264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1db013b383e24526b83922ddecb11530c94c96d97da47754a5524104f73ef1. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/GBSZM1300251.
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
Critical Presents: Systems 005 - The Redders EP
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2593444f78967bc99048657b55f214894aedd6b8b57e748bcd87fb81063e1c60. 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/GBVPL1600068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fdaa098e902662f580c5db3f8031784a0f7533a7e2b637f98c93c0702b2e141. 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/GB3SR1000109.
Critical Music Presents: Underground Sonics
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea59adbc84a46434596b82f56dcd71677a10a82c86bd26cb743a3474958d181a. 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/GBVPL1300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517f48a930e9cde8774acf2115ce5dc20bb7644a3e6b4b39e9ed35150c5431e7. 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/GBVPL1300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c3cea64d380e65cd537e8dba708da71e71425834d8b121101a22270a6aa3bf. 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/GBVPL1300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d4fb56dbf46ef5fccad47b6c875537787e28ba2aa15dad2d7cce6e31dfb5d4. 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/GBVPL1300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9674320da9a8d1c303bfcb713f492baec74fbfc8132d8067c7b4d275e167ad1. 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/GBVPL1300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ce23cf318636949b0694e880ecfbbdb5364f52853c95020a942c95fb28348f. 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/GBVPL1300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27868407fa4d918dcedc19ba1d5f189033cd7e44163b7238f3b38dff4c439781. 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/GBVPL1300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57bbf659257f1615ef1fa9023efe6aba13eaf7af7424b7ba40661fab6027c95. 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/GBVPL1300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5280074c8a4fcf78ee23bd3d36e1632bdc7e495d2ee1eeefedcc8c53f582160a. 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/GBVPL1300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b2dae3bbbf9f4105d9492f3fbe70f2f4244c904858cd9c6cde8ce701cc856e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBVPL1300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884b3d96fb8d8470d4ece8d57715f27ebb8ad1c79a843d8dc41a827426fcdeff. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/GBVPL1300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3954a56f0f9ba5ac2dfc88b369f0b0fc8e00322ac74f79a58b397f3db38fafd. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBVPL1300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6ea03df9c702fcc6e1075d102b8acfca647dc07ebb3dde5589e3c048c414de. 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/CAX1P1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda72016d107c39ec2bbaa5df4c5bb7ebb168470c694cc1693b926a7c7abb48c5. 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/CAX1P1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de5c3f4cdaef4b84bf9e964870637e67b0b8e49322e3afc8cfeae684fda279e. 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/CAX1P1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd308449c9ece05ae613dc49423cbacaf4b94502756f09a75eb0cb13c69f1d27f. 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/GBA2A1410030.
The Foot (Loxy & Resound Remix) / Oppression Dub
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6cc6c815eafa9487b61dcdcc60908929c52b2b13017b82dbe52d618d67d4af. 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/CAX1P1600001.