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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3876d303b8ed8bd561c7e46a44b6acfecd67671a31bd364b6a5fc07150561a8. 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/5d4d5bfd-db12-4a60-9b76-fbc463b8df1a.json and https://artists.proofprofile.net/proofs/artist/5d4d5bfd-db12-4a60-9b76-fbc463b8df1a.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f673c9f899715ce48cbce0b780f2c0638bb11def0903263689fe95e52511ac. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/ES71G1807654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e9c0d0e51b63d91e1e2d4e5f1bc38d153945f869b81f463594c3a3dd43788b. 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/ES71G1807659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5df92e641ba8a2cf2245df76b69daddd00f8ae0ea5abe504553f63d8433f3fd. 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/ES71G1848598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a57050310edaaa2701907a5600162c3ecd142d238da555bed530e3af3e76800. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/ES71G1848601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf07bad618d8a9f166b755075af54ae18bfeff2e80abd998fc901bfc04408157. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/ES71G1848602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5508792d18a262997f97194ff4233b0094b49c7a4d31f124c22f282a49f523. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/ES71G1848604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404f333c6306f950003fc6a56a785d67d94ff0faa235fc143009608388fbcd84. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ES71G1936247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093e9b155a5f5137964b5d08938fa903cca1bcc7c37711e484b4d7478f9b77c5. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ES71G2052668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cdb87ee9ca0b7dc8ca7ece96656ae6fc7877c7f1ebe6ea676777182b60e356. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ES71G2043770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0251617a602d9333cd882036d52e9bc9aacf0ef300c1290b8e4ae28be7fffc. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/ES71G2043771.
Guerreiros "Live" nos Estúdios Afro Music Channel"
Guerreiros "Live" nos Estúdios Afro Music Channel" (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfcdb668c8f47dc41e0647bb2dad2cafa04a4431c44028644ce2ec67f022d4b. 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/ES71G2138582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361344cf2f3e133178f0d96248789218a5c47f7a554f62c68bf3cbeadc7c05fa. 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/QZS7J2266929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17e20dbed800f0e6fd4b0f6d51fd1b8b14eeafac825704d1ef656ac9bfae362. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES71G2339081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3412db6d3f738f8921cff544c972f3ae5303930fc1b5ba7e526ea25dccb711. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES71G2339082.