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 0x9525cdb53994bcce9c98562dd3f9086ae02760c85c779748348ebf120117afaa. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09d255b6-0ba7-4672-832a-d5db7f9e2658.json and https://artists.proofprofile.net/proofs/artist/09d255b6-0ba7-4672-832a-d5db7f9e2658.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 0xc4c86a804480e4b47ee81299da68e701275565c765225c76c604ef81e9c6d568. 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/BCB202200003.
Juremeiro / Pajezinhos da Floresta / Chamei Mamãe Jiboia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0a36fd1fff2335c3418b9ec361d2167c607966ff3dcb229c26d46a37a4c893. 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/BCB202200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2c10597296d685cc129da996d09b373c0f5bef678f95a76d03f424b45ae2f1. 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/BCB202200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733114803e7959dea3c1f3806d2473fb1ee50f92f9a248c60dec3ba1a71e9311. 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/BCB202200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffe622184cd55b66ca50619637fc51235c4f681e00a2e90ff1d29ace21ce482. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BCB202200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c45dfa3bc1b11a574478721eba6054d3a14db182df969d81cacfe811b683b9a. 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/BCB202200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403fec3eb0f076790be3ecb3083368c08a093f51293bef501b1ba259473d7f7e. 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/BCB202200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fe018f9470ac64edb5f7ea5682bb2498940a0a037ee0aa5f12faf6ee5df688. 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/BCB202200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9828700a3ec234a314f27c66e8cb4118bce804d7097638ce3789a987a0583f26. 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/BCB202200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3d58d8db6225775cd9a9daffc1822166a8b84804a45983b9831c1393065a2a. 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/BXZ4X2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb025b1dbd876ad10613eb7fd84ce21716ac043b61e04a9d6c252f96ba189dd. 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/BXZ4X2400017.