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 0xb9a2b4530c9eb1ba716a4f9d8959849984fbe2f9465f5b5fc6652ddda78c3428. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/823c97a2-ee89-4659-98b9-54211c9e2933.json and https://artists.proofprofile.net/proofs/artist/823c97a2-ee89-4659-98b9-54211c9e2933.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mandá Loiá - Cantando Histórias da Capoeira
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 0x04e52641ecb07688e440b3413717eea226fec0dd4e85e48ca15388c1cc5d2468. 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/BRMKJ2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476f7f74bb71470897faed96d848e7e74504670b57eee0a3e816991d4cfa7fb0. 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/BRMKJ2100002.
Catarina Minha Nega, Sai Catarina, Manteiga Derramou
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f29847a9387e2aaaf9dc5ada979574717f75183402763583b78e6e3a35842ab. 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/BRMKJ2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab8ee20ae8b1f9724185e9c24c5b203a5c376e952f42c62379c3ebee17cdc34. 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/BRMKJ2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36371a4ae0586681002f5e97789a6669e1ab2ca162ff6644c30709151a79d824. 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/BRMKJ2100005.
Angola Êê, Vamos Vadiar Angola, Eu Sou Angoleiro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8896f49f9f44062d2c2419ae8ddc39e31cd1a27001b4c5e80d54420d07cbe6b3. 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/BRMKJ2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585bec082a2af8dded4361fb9903913eb21c8686d049268af32c488b7179b0fc. 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/BRMKJ2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd72cb2d12affc793fcb7919fb0d775eceaca00428e810187a656048aa234e2f. 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/BRMKJ2100008.
Foi na Beira do Mar, Beira Mar Ioiô, Quem Nunca Andou de Canoa, Maré Tá Cheia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3220843b41f97b56e7c8703cd8142ecf15cd4408afd67edc60fca01186e51cc7. 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/BRMKJ2100009.
Aidê, Pai É Pai, Mãe Amanhã Eu Vou, Tu Que É Moleque, Menino Chorão
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9007a5772754fb4923706c6d73e439ab40f6767d0d792a0f30082a06f3f5185. 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/BRMKJ2100010.
2 de Fevereiro, Paranaê, Bananeira, Adeus Adeus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0abfb62ec92980dd4e225e4b8a2be15643d2b3d9d41916746b574cd73a649b4. 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/BRMKJ2100011.