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 0x4fbb6b91f74743a46a8041cc71bae4a1988cf706915602c7bf5364a8f1bd85a3. 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/8ba6d310-004e-4bfa-868d-cd8bdf27a9a7.json and https://artists.proofprofile.net/proofs/artist/8ba6d310-004e-4bfa-868d-cd8bdf27a9a7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sequencia dos Raul - Berimbau Atualizado
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 0xcfbaa0ca0a3342557b30cf55e0ff88a0abc0e4e67302e2c32d5f56ee93ba114a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BCUWS2500157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad07860e5bc7784c135bf7336811c06d19581d85eb7e1f16c136ace146b2211b. 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/BCUWS2500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebeece00bcfd24bfd24cf2edda9c8b725df55b6dd8226fa498d21b6c343471b5. 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/BCUWS2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e3eca0e4f9f104491fe63b5143073c78d1ac85bdfa250a034cf3bd4bda9333. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/BCUWS2490362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77d82c900530fecf8bd8d27d641e605f26d02f2266a9c66cc50f1e809ed8a9d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BK16P2500279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3536239edfd315a96d83327fccb73a8e16942f8e62af0fc0fb2ced90933c4d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BCUWS2500244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4119e15b437ff4e28003b4b867f03f60c34fef3065313fea3206fceb3b1eefbe. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/BCUWS2500245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7e699c93d3ebf857705739127b70d23f1f58343f19580a0fc6d4a357bb049f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCUWS2500246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca16d31574abab0c3b4b18a7d41f438b7fb67077aecfc2bc04783a2e128d18d6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCUWS2500249.