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 0x77d44c9edac37ad8d4115d5a2478a0dd310c3220affd32993d3a70c43070969c. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/663ff99b-d4e9-4710-b37b-71c14e637977.json and https://artists.proofprofile.net/proofs/artist/663ff99b-d4e9-4710-b37b-71c14e637977.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 0x7488a02d19dd6182d15e21570b028917b6fa9bc76d114a7cfc4715025b2b8490. 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/QZNWX2412813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289e6b93f66067f0473775c4729ad5a11ac3d6693d60e7d506091a6af0743217. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZFZ22504274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0c689f9d3cb79e2525a6b9f0e7d7ef879123c375ef52c8f6449a7d778f06d0. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T05:51:54Z), 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/QZFZ22506404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953267d28cd1a9d140978d908346fc4d95841a41c57e43cac25bfb851a360e56. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZFZ22506408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147414a9888cba2931916ccf0fecfa574a057df9480c60374af464287ea5a091. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:35:48Z), 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/QZFZ22506406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551f9a25d17673540d3679fdcba7ecb5060726ce18abdb7cffa7e8bba69f6a18. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:47:33Z), 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/QZFZ42518071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e2c22b66b591eac031d02c6a3d999cfa9ffd91ec87cf606856109f4d87481f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFZ42520627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3deb8ec2aed7aa4e302abfcb5f3712f726c3e6e662487305195b2b3ad1f6dd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFZ42520621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b724e15d3fdebce26b4a45ec0b368424aa98fa2c8c3b47d31c8e1863a4ce4e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QT3EX2508178.