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 0x213dc2b9d4c1c6bcc0e6ffd169a6837fb3f220ab07b34baa98ac1b68c2fedd23. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/710ed947-e446-49cd-b387-f93163795139.json and https://artists.proofprofile.net/proofs/artist/710ed947-e446-49cd-b387-f93163795139.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 0xcb6cacfd90a65b94562b78ced3f05db3fa49af14feb88fbbe39bfba8db911e68. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PENMS2401435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd10977f742c5e06ec01bd5bcd3bb84921ef60d49fc9f7aa9df4f35a00498f91. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PENMS2401436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1920219cadec1aa03e9335dc2334e55ca1380d4a5373620886c18d46d309ff. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/PENMS2401437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f45bdada3077a4af55d4b2b4ca660fa675b2e39dd48e52ab587df05c3362ef8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/PENMS2401438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad6e537e79101b2edefea2608bf1c45e6433894aefa1f339383693ab8fecfd4. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:49:38Z), 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/PENMS2401439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a3b90367806f23ac9698060b9d0930c507e6c28f83db4470018c0a09c25640. 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/PENMS2401440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938cb2c0845157e5012d3866c7f210780e94a85705db892a4db060e827371c0b. 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/PENMS2401441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f128f263de53fc2e1006d750ba056ffc90687f65dc62261e29799cc471fe15. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:47:57Z), 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/PENMS2401442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386461cfcc580cfdf9743cf3bf14386658bf74d2e2ad6d197ba77e8aeed002a1. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/PENMS2401443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19bff8797e179108da1820b0f08a780d51b01e3c35399b43783140f694039833. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:39:02Z), 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/PENMS2401444.