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 0xadc0a997be5a19827c2b4a3156a36655a1b1729f59dbf23349e12716487be5ae. 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/7c20fe90-c0c7-4695-80ee-5434c8fde774.json and https://artists.proofprofile.net/proofs/artist/7c20fe90-c0c7-4695-80ee-5434c8fde774.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 0xbf9d7e430cee87d74a154e24c1bb907ab8a08de81f481b17ea4ba6e4a1a9d8f4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRCK41800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee394be173520e21ed01b40beefaa1df064857af9060ab821f40dce63aa22aa. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BRCK41800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f846d6b982f957dbe560d4f4f8d68d5fadca14a40296dcef9dd7b12dc08e08. 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/BRCK41800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda34876a446bddb854a1ef5d61505ee6d9721b64848cd4504928f22d18ce34ac. 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/BRCK41800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29664627a94064797b688ddd7aaec2901707912d08bcf4b3c09c0aa11ac9a38. 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/BRCK41800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6e7207e23eff2050f891c0019ea95647abc8bf6de1f4969763869bef4b286d. 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/BRCK41800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c806bddb8ed7ad1540f41c3465a7facc898ae1e598c438132c14c2bef4b0c60. 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/BRCK41800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c5073355a4332ddc310901fcfcc1067129118aa17e57cf9c5297e872790986. 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/BRCK41800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab726b4f291489ddaf481e0d13d9b04f93c05f8fea5f20aa0b3bc66849477aa. 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/BRCK41800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67196e1329ccb0a173c9b6e5543a8c68fc247f9a3e3cbc65ac7db1cb85ed695f. 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/BRCK41800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85b08011562853318b93a777474b7f8f45dee803330fde2ae5aa794a1c4959d. 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/BRCK41800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855fb8ebab793a95c537eb638f85ef63bfdd795636fa191e879df04c0e013e1a. 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/ITFGO2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3bcc5f610fbfbfdc61d0c23b674fb4431b4ee4d31fa3f54ec21321a09eecd8. 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/BCD1A2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe598b06b4d15b9e67f434ab880593b2a0a2d3a50683dbcde85e0c6f9afedf263. 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/QZGLM2093566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2cdd65165d1ec92e6c6aafd53a1286c2015919efe2778ece9cddbbfc839ee0. 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/US7VG2086965.
Mandá Loiá - Cantando Histórias da Capoeira
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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172896677728db6d201e05cd425121d7bde1c03d18f8a44ac8cae084bf8349e2. 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/BCUIM2100011.
Amor (É Revolução) (feat. Dandara Manoela & Bnegão)