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 0x6d68803caadc970ca1f3240ea865f36c0167cd7a397394aa1595a1287de4bf34. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7af2599f-4b18-42c0-ab52-dff64508eadc.json and https://artists.proofprofile.net/proofs/artist/7af2599f-4b18-42c0-ab52-dff64508eadc.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 0xf6ff7141bf09d01acb72e3d3450978ffcf5b1188e2a69e8ac86d06f3d4ed96ad. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USYBL1901105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659c94e8bc3e917420bbb5bce41a9f23e699288b1956f474400e422be521f4b6. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:36:09Z), 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/USYBL1901107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082fa097d416258b3358f9cd1dddc8769bc72208439f7c1ae5e96f84841790ca. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:10:38Z), 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/USYBL1901108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a2050f0e0fe58000ef81d675196c6e3fd0472756139a9571f804c7ca8a8bbe. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USYBL1901109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d57803b379be023e0cf7be9b1a57e2f983cad7ddf900d010de33adbf7823db7. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:50:17Z), 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/USYBL2102316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c297d4eaa6b7a6c17ce493dd4f6ee105f77d776f9d18ce02657f3d7485174c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USYBL2102321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce5d082ad1897aa9270bc2115f467f2bbdd9a3841094b1bc5ac62a6967e8f4b. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:33:07Z), 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/USYBL2102322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cbf12d03ebf4aca4f2967d8b6309d7425e2b33c03f2990a664517d14ffb952. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USYBL2102325.