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 0x8962fa60a1a59a6a160c442d311d2b230296b79c5b6a72f593a4c505f8d3578d. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63866946-efac-43ab-b93f-42e81e732702.json and https://artists.proofprofile.net/proofs/artist/63866946-efac-43ab-b93f-42e81e732702.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Sua Casa Não Tem Parede / Deu Meia Noite - Tranca Rua
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 0x23332801fc862dd4429f41dbdc5c03a5783de6e1df4a4849e70f2cfc775a24b9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZW9L2485612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddc074077fe706f9fbd75244b6c60dd61d4fd18f79be024176231fd4afcfcec. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZW9L2485613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1fa50f950b6403b12a8eb53a1dd52ad6d929c1045c0f0b8197f6f4deee625f. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QZW9L2485614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253226ba1229564ceb80c5980a22dc89be4041c6fa3858b893e3031e545cc320. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZW9L2485615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92260376721a7593c44a776b45ae21ff677a07a39cd3bbfcf5601fd3e5df7dea. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZW9L2485616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858e8f7f1d41d15369a1ef39c3b24f1a3258eb9e0f5ea6a6a02e8e972bbf43d7. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZW9L2485617.
Menina Me Ensinou o Que É o Amor - Pombagira Menina
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea800354b620133999a8a69b22771343a123002d1ecf0f020ec3d2110f749ea. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/QZW9L2485618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e3e1b51f646e7e201b25181e591489b5df8000cf83b2f68ef13030ee0f9c3d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZW9L2485619.
Lamento de Malandro - Eu Ando Triste, Zé / Eu Menti pra Ela, Zé (A Cappella)
Lamento de Malandro - Eu Ando Triste, Zé / Eu Menti pra Ela, Zé - Acappella
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42a081143dac532c97b1fa8006a163388c9e65895057d0a5a0459b51d501eba. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/US7VG2579951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf366413de79b84a6688a9aa2c0b6b5ef00224a5d510c876105f2eb63a6b36a3c. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/BKORX2500340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa985f5688d293c28201406dc84607c77ebde055b1b31047a09adfb4d55774c. 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/BKORX2500343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a61f83c92ef4596e8aa9a357b360137d0f9e93a12821b40ce4a07459af764d5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/BKORX2500347.
Ao Vivo no Quintal dos Orixás São Paulo II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145fb22c1d78bdeaf41750ad76cd5d6606dac5fb143a8052a5da26e92c7c90d5. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/BKORX2501208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5522d2544efb95287fdcb200bb0195909f4de66901b1936901dd0a2e7ad416ff. 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/BKORX2500043.
Sambas de Macumba – ao Vivo no Maria Zélia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77155d0c657000465afa87611be12840bd9bcfffb2781cda1566e8df1ec289ff. 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/BKORX2500213.