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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47630a1b96887d763233a9822b10b60b0bd4d75ee2b81a95cf52cf85a36ceec. Chain 2 (Bitcoin): anchored in block 954593 (2026-06-20T19:46:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be2db4ee-5018-4b24-9d3f-3021f08fb854.json and https://artists.proofprofile.net/proofs/artist/be2db4ee-5018-4b24-9d3f-3021f08fb854.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Caipiríssimo (Clássicos e Jóias da Música Caipira)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9118528bb9c4660941323ecfec91d09e813f826ff9fa60666c24e87308dadb0. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QMFMG1358433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981ac9ec49577f45187332b83700463b07a014ba2ef2a68650c21285c5db5897. 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/QMFMG1358435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb408c1f5ec605e5f2a1ace6722f846b36d135c8a0dd8ef5b1e9cfd973e9509f7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMFMG1358436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440a7a78feb40116f5c7454941f6b32280b624c18291a3d1ca73e5671b984b3e. 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/QMFMG1358437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe677d0fe86031b34376f26400f39eb612581a86c78ef41535f11a5b7a3692529. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMFMG1358439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdb7ea31f79fa317579c68ff1a91e8426785ea5de8191414e2ec46ba2653d55. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QMFMG1358440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dac7082310cafd977664839adae86e69a9b2e8a15d66b28d694b8eec327faaa. 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/QMFMG1358443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5739e92b38a0850ec98b79eef125496d3ad175c44db92074827a4809ef288b. 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/QMFMG1358446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9e40a4ca940bfce0cea059edf3e571c743cd29f59b671914395deb3af17990. 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/QMFMG1358432.
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 0x79e56aa2cf0f0439862245bff4f6a350fa66d37477a03fbc3a28b558f0cb8073. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QMFMG1358441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb70c3a72a84ce395d74fedcbaa5da10344d20bd8e499c06cd173a2f39d964e. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QMFMG1358444.
Suite das Mocinhas / As Mocinhas da Cidade / As Mocinhas do Sertão
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002285b7ad55313244cc68ede2c2a928e39e79acc23e2939fce3adbe557e735d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QMFMG1358448.
Dandô: Circuito de Música Dércio Marques
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bd105281f4cd3d2cc160da983bbefc6252cd3443238055e66dacbdc8d31cd7. 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/BROOW1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c786447800d2ea84a376d4d641671fc9e1ab4e8ddc25bc2cc5af7dd67759645. 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/BROOW1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2eea34357fb303533fbb2fea1c2e2dd3038d29696a7ca8a4f9a5276c8b54642. 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/BROOW1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ca0f700516682bb8e6b0596753ebda829477b849d64ea86610bfe74b514e30. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BXRNV2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206c6c3e19607a1c3f66857dd458b56577dac21bfd1c17a2a6648cf6f09dc6e0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BXRNV2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec82cea950128a1e586ac597d4da51ff57f8ee01d883e33e7d090b65196b3b0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BXRNV2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93019303f8006020b61fa7d7008492c39c29cb179c94e7ef010c5dcff6c72202. 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/BXRNV2300028.