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 0xf2032c5e7751a1beca7ec351b69b6d2c5745d1ccecb35532c8520e0e854dcb2f. 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/27884562-1d58-43bd-81ca-f5b207da04e3.json and https://artists.proofprofile.net/proofs/artist/27884562-1d58-43bd-81ca-f5b207da04e3.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 0x7867fcfb35b181e55c59267a6e072dbd6843b145223a209acb26610dd17e443a. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/BRVIL0400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0e6563175c81ba4e3cfaa5791ffe963bd09e4643fcf5abe23ee48ca1b04da6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BRVIL0400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd22b779e94169720b6890ccbe1823434abd3439f1bcc3c39835e0973134c942. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/BRVIL0400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c362da99b91ddfd7c5615e0b0a8f52e7d0a48a5bf2abd608a8d49d2d8a62e5b. 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/BRVIL0400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bb1cd012bf36b3eeb05327940391961ca0f155b19f81448708180cf25706b7. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/BRVIL0400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc305289b71653f0abb76ae80f67c8af59b80419800c1f73391efa2c3f47face4. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/BRVIL0400053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb2f9591ce87461ee914a822233435630098045450e240962390e502f6e3cf9. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/BRPUI0700730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3edc5f9c564b80ea4fe8145af3a700b4ad7a7976a211b32ff242cfe32f493ae1. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/BRPUI0700732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa481a385384e7e3d96eb82768e8c3c41dc74d1eef4f9bb8238d424f174772f08. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/BRPUI0700734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0756331645e42724c996e671884ce64d4e3fae35762a2f7d8f8d57a2037f9f19. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/BRQ3L1300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572fb7f2632a2740f57a3cbcbc61ccd570d8c86db8ad7678023c5dff9a5bc7dd. 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/BRQ3L1300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb385f61e03134bafa4340eb90c0d92c2b270914b2f234af1b392d9db0a9dfeeb. 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/BXOMB2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bd91f847222a7a471e5a2bd70620738c134d90c95301b833bf04b608a8ea39. 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/BCDQH2300027.
Festival De Música Carnavalesca De Recife 2011
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c30d762ba385f6356e81babe64d1e270e8b0731f282f754a14d4c684160414a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BRPUI1001023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1212ea59d627617c3009152a66ada8e93263b53d54215a0574cfc9d16bb8d0. 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/BRPUI1001028.