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 0xb96030f6a13eba8d324c7235cd1beb5e72b1256cf3b8315b38502467dcd2c8b1. 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/c2ee83eb-e198-4c31-9475-5a1f547f8fc4.json and https://artists.proofprofile.net/proofs/artist/c2ee83eb-e198-4c31-9475-5a1f547f8fc4.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 0xa19feaa023ed1f0610d42ebcfb3f32264c44817b73471a2debdec42f43604808. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BCDHP2200196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25bbc60b6658fe01a7a5fff32a4ab46b130d99d0ec7e3b17bfa6ee70674c40f4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BKORX2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fea2dc061561895525aaa434c21b91f996f2c19c1359e7b1fa5f31512afe18. 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/BKORX2400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf21cb1c1591e1e3bcd72f305e6dda5e526dc1a4dad9cba0af2eefe4578d231e. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:39:47Z), 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/BKORX2400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbead7cdd2a011ad906bef61a1b18527698b5e85bfc8e8bdc623dc50008b8ec60. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:06:41Z), 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/BKORX2500169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41919bebe4404bbe1f93f89253c4f613a77687e6e3c81a8a2b291225ff11d68. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BRT2D2300148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41919bebe4404bbe1f93f89253c4f613a77687e6e3c81a8a2b291225ff11d68. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRT2D2300148.
Mestre Guerreiro / Seu Tupinambá Quando Vem na Aldeia
Sambas de Macumba – ao Vivo no Maria Zélia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070289223de9f9ea55cb7339536165f3a52dcd44a9eaab48bd37d585ce3e9b63. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:48:00Z), 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/BKORX2500209.
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