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 0xb7fedb23ee2ecf0351c96cf5432fd2798123a6eaa48a2fc0d7420bb83ade2166. 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/3834da4a-b003-44f1-b554-e6eb495ef867.json and https://artists.proofprofile.net/proofs/artist/3834da4a-b003-44f1-b554-e6eb495ef867.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 0xb2df3f6c352785c21d94651226750f84b118a33e3aca25a0c09cb7c5e74f5c79. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BR34S1300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f197112693effb957a8092e7210404a343f9edfc2b6e695215050658b4a5447. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BR34S1300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7438be63572b26d26f5ab0bbbf6bbd6246072e324b8fca6911807276ab4d8cdd. 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/BR1L21700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb090e0ef1e9eaa0977afbacfbcdf7512ba39f8883da91d0adcaf83e5376edad. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/BR1L21700002.
Toda Menina Baiana / Que Bloco É Esse - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86d0e68545ceef15d0e5cf5b616acb0c6703e375426d39336cb370ab9a7ef10. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BR1L21700003.
Desde Que o Samba É Samba / Madalena / Sandália de Prata / Samba da Minha Terra - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d123c5e519e5154d100685bf8e6d8ef63fb2cea7dc4bd26cbfe5eeff42e8d0b. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/BR1L21700004.
Não Deixe o Samba Morrer / Você Abusou / Mas Que Nada - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b5552254f5ce0cf06d96cfce08e6892bb0024caab4b029edb26bc82d12f7d8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BR1L21700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8601215d7960b6db7a63d28d91d8fbbece2db3ba0c3cff35d24e4b7727ad5623. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/BR1L21700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab362982ae7b5c0f767c7e0f97a257de3c1c9d0ce6c05484c95f0bb7a8dcbe4. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/BR1L21700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e1fae886e2a9be8ee5e96167b54ebcf5945f35135efcf4cb16ab95845d0279. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/BR1L21700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c3c2e73b6d1762585d4bfb23e905af68eb4c3f242cccf3681165311262975e. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZHZ41943421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301ab4d03096d13ed04778d396d7637e981344561b9c9471e7105e4e015f2545. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/BXUJL1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301ab4d03096d13ed04778d396d7637e981344561b9c9471e7105e4e015f2545. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/BXUJL1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074b8f3425bc2a4ed59620e44f9d9262f99eaad444b5d70f054559b59c4ea71e. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/BXX4Z2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf584780cc65b912fa941960ddf547fb998818125d885be7584c8f7d8c3bd401. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BXX4Z2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d56201dab18a3b4f5564475859d7727b1626ebf45f5518becce27ee059b679. 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/BXX4Z2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db0f545653e1b866d8c9ba91ef6f8d791da5d63b1a3947bdc458630c47e650e. 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/BXX4Z2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5198afc34dfef89dfc696d091c9a665445743c309242cd36c60258e98094f4d. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/BCO132100002.
Samba-Reggae do Futuro (Bahia Bass 10 Anos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa67ec5e6bcf8daa446bc8cf105b16ccacbfc87555eaf8b5bae9e9764d6ec26. 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/QZW9M2417254.