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 0xef60d24eef4afb81b22dcf9704af138478984a4d8c2965a421ab31bc0604b311. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9753cb76-b1f0-4c0f-8739-1b7ccfc55ae6.json and https://artists.proofprofile.net/proofs/artist/9753cb76-b1f0-4c0f-8739-1b7ccfc55ae6.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 0xf72c6ca47788213d6e7f24a3ba831f70c5dd59a19852b914f91044c4035b44e2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAHP2372569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441c8823f80308229040d9e01bd17c2799002d3c736cafeee0f75c78baf80527. 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/INUM72500321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6ea6581470d7458f53c0e8da4390f3750c5f6b6aa85347703f4c9fd61e101e. 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/USCGJ2260757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb1528c71229e6689f04f0c047876ccde3267b922a26e92097565eb01824461. 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/USCGJ2260759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0505c051e268c6ede925df9f5aa347eb06e75c90406a30a4f41c1f2e37f0aaf8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USCGJ2260760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52345fe6d4285828397a3b3efa6d73a3d923829935311981520304b853914ae0. 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/USCGJ2260762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4383bbadf3d55e4997dba15e3fa7f35f3a9a9f41eef6f4051196a8ed3fb5d467. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/INO131603294.
Kaahe Karat (feat. Prateek Narsimha, Suyash Gabriel, Saptak Sharma, Soumitra Thakur, Rohan Prasanna, Varun Rajasekharan, Shrikant Biswakarma, Madhur Chaudhary)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af4039c4fb974604a8890e5d324bb85c25ec76cbabfe4b4bcd957ce22ae3ca0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ING642409901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72c6ca47788213d6e7f24a3ba831f70c5dd59a19852b914f91044c4035b44e2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAHP2372569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746552d5e0e52fa8aab171ba90b225a5dc9d653946ca093d3f5830729a4ae40e. 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/TCAGQ2232787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9008d152ec4b545f2da5db7e46fa8356284ea9c2c3742a9a36d28167bed6e61c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:08:15Z), 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/USHM92285878.
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