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 0xc5b2d2bd0ece40f6509cd81f6823d0d5e9f0c019c6ca3009b65c0a004e14de48. 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/2fc39667-d5d9-441b-92e9-64e980ea0a73.json and https://artists.proofprofile.net/proofs/artist/2fc39667-d5d9-441b-92e9-64e980ea0a73.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Boca Vendendo (feat. MC Saci & Bruxaria HITs)
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 0x35a09678bbc004b4268e48596c80b58ac808b12b0f87fb6448e877bede08f93c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ESA112445568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87590642daf27f647d449608a5b0887cb8a468c464f1be2cbae02607dcbaf2e2. 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/QZNJY2424517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f8c7f7d73cb8862c9db2f28b7ccd14fa3584987b675cb0972fb149c57a9363. 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/QZNJY2415403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb443e3f537d4c91c5e3d258fee831b2136b786df4ab256e6e4d3c6da1f47d17. 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/QZNJX2494088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f266d85fbe03aa88c26f6a601a0ee249e0c3760b35e04dfa4c38546b24e0cd. 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/QZNJY2488377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0616532940e7e0ca96941fec2555a4693e163d52e9fa51d99b254b8bc48f62df. 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/US7VG2445604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb94e03dc9753a4ef7b4e9c556f29bcdab22ddfeec8ffe53f72c950d454bfc56. 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/QZNJY2408848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd668ac8e55abe97c3bd13c7413fc1fe5b41602677615286c2cb305c79aac33. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ESA112438414.
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 0x02b805bfc618ad6653684961c823d13d3f799d1293fdcd5d2d760bcd03440c1f. 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/QZNJY2442263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d936a077b28740e8b9b2f6372ac1cb1b2a0679e087d33cdc075b263522aaf4. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QZNJX2488879.
Fala Que Eu Sou Bandido (feat. Bruxaria HITs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6320dd3682561d6804eaabd2ea2b76dd0d884cdecb596f1f378cad71eb949697. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ESA112437629.
Vuco Vuco no Carro Bixo (feat. PZ de Maranguape & Bruxaria HITs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af0a7597321ae12c3e48c96539db8a4a16eafff2154ce6e72b8c22144ad32d2. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ESA112437640.
Os Cria da Loja (feat. MC WL da ZN & Mc Xande RD)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfbd66df94ae07293fb142f0d7a997487878398db165d044eb7d0b5906f036f. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ESA112446073.