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 0xcc650b1fcbe98a97287ae86070430f7f3cec8c9634b4ebd22e3a3a80549e71d1. 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/e6881b5b-aafd-4ebb-97df-5f19a27ba742.json and https://artists.proofprofile.net/proofs/artist/e6881b5b-aafd-4ebb-97df-5f19a27ba742.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 0xfb377f88fb27eb9df8372275461c4b38cfd8849b36c13e50dbdf9a7287c4ef06. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ZAIC31800194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48dc90ae8f5ff77610713ffa9f8da30fbe63c305c15d0e5ad0e252e6d7fbe45a. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:45:02Z), 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/ZAIC31800196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8217d604c714a76104f9f0123f75d5062251919a99f52a51b216f7d57c8e444a. 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/ZAIC31800198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd6631e90818d46e1458e5cd76cb49cc0dd7e4121d137dd54d341d45ddf6e34. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ZAC050100045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05001622522e2a3c497aa04ff107dc3cbce43b928fd47a16b8284979989f0a72. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/ZAC050100047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96539cb614e171660a201dd328560b55acd12c78916b3623b51efdbaeadf831. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ZA1C31800212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cfaed54d9e97507fb2578ac08dfeb4c036dc5cfd967e3f0fc7f33eb1fffe33. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ZA1C31800213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ee7a0c9445276266744d2ec2b8a64cb9ce0941aabcab3ae71e844a0a58c6ce. 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/ZA1C31800214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315c4f959d22d06c3d3201332fd3d543f67ccc715b2e410b9d6d3f926e55627a. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ZA1C31800215.