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 0x2c0350f17494a92fb038ce0399eb469c435d6635512ec420c7c0f60b48164480. 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/b9c742ac-be57-4696-906f-b66b0d0e37fd.json and https://artists.proofprofile.net/proofs/artist/b9c742ac-be57-4696-906f-b66b0d0e37fd.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 0x8a755576529267644b4cdbd21ef7693187890634b75dff672222ec88cef7bf95. 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/BXLVT1900145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44ddb3b4eed811b12b5dea929f48a2232c005f801a5bd247c85631da5b75522. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BX9EB2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb352952aa10a53888cd33bbccd8fa6b229b44c9e5fbb1f7bca5087a87d065354. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BX3CJ1900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271551b1a08b66894d4ad9453ba33bc2578cea6fde3341ff7a4b87c7b9ae973b. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/BXDXV2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af0ecbb152c10c944634e8ed41f691ebafa24fc50be64a537749d4229584e30. 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/BXDXV2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc83f3025b3450eadc508bd656e3e7a219749211cbc0cfed30dbef23c86ffeeb. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BX3CJ2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001de159c784f66381ee522697cdff003fb4e48f582547a1982eebfe01f4ad47. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BX3CJ2100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887969c409e8a25e7174529a9680466bad6ee3f59d9b49ea4c13a4ffc650dba7. 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/BX3CJ2100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1db1358e099e433d1f3a16f2880e48e0d0e147dd9fc7c5ab92f05ff449719d. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/BXDXV2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48644d7873a8d5ca3afd646bc5ff0599508f4e02c39a65e36784271c58ee0140. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BXIED2100193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001de159c784f66381ee522697cdff003fb4e48f582547a1982eebfe01f4ad47. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BX3CJ2100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed2fd473951fa91adcdc70612a417a8d1361e76552bb86c230d308ed79c2ec8. 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/BRTRB1990842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07842a1be3a32b488b95e6acd8fa72d0a0108600d083e322b1df30175aac3fdc. 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/BRTRB1991074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161bb84df54e4e0d8fe6d9a56af5e7f3e1e514ea85d21259a2c6897b22536030. 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/BRTRB1991078.
Novo Ceará: O Melhor da Música Cearense Independente
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a8863b22b65b1fce95b7665cc8d4add12ecbabf32e739f186e8f19b0c39668. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BXAZP1800110.
Tempo Pra Recomeçar (Marsol & Diogo V Remix)