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 0x609e3ce0eca22cf03925a8b8ae7a6ed4e56e8ddf9e7c5626a111f410f9de103c. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/abf1bb74-73a8-4a6e-ab8c-af05c5121ff2.json and https://artists.proofprofile.net/proofs/artist/abf1bb74-73a8-4a6e-ab8c-af05c5121ff2.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb2b4d3bcb2b361ed0688509ce1a6b91c92df4b6ffa69bbea676eba6771eb81. 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/QZNJV2004078.
Noventa por Cento Mais Mulher - Acústico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1d1531c48a9ea80f58c12d527c47bdebc72b667ac7f30fb07c275b7439d754. 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/QZNJV2004084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef730f91b8aed9d265a7dde23be99af0c7d96098065636ecc26ade5bbc9f341f. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZNJV2004079.
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 0x23100f87ca85dd7b9b2cf8335c3e30d4a938fbecfa440d024995225f7053d586. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZNJV2004081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a03e63271a5f60f16a08dd1cdb86942a63131afdd345a2b076c6d7820add72. 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/BXNNY1700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2656c6b27179c375821a44d5b9e3d41f4543ad6eb532a6b9edfe917aeef4f4df. 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/BXNNY1700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4f107fe3ead4714bfb9d16471d459bc8fade640851ed36b6f7063aa93da328. 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/BXNNY1700029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf934c0571e6aa7fed04c083d08a87d58a770f8496237a36705291c5c49e455d4. 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/BXNNY1700031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae05a29be39b8613edb8185fdaf5f853663a141440581f823179bf7f3f50923. 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/BXNNY1700034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde82e8e88520631986fee905a7035056594adc499c6f0575a970e78b56b58a6c. 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/BXNNY1700035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52e4e2f2fe02b444f4c4e39aa3492f6ac5f6eb500f767cdee41236f3846455d. 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/BXNNY1700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13f6d34818d10ee6b2f6823cde6fff4ad371df81b9230dff03be789f5142c47. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BXNNY1700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa279245414c25bf3fa6c4a34f030498991ef9aac1d2ec27131ae9f6d0f61bde. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/BXNNY1700036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a1caa5235f245fc5487f8218035a6090be7e01ecfa1781f1ffd9aae57ba796. 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/BXNNY1700033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d50fa93bddc52d02e6521652006bcff50012f2607c77cd216f038beb7582fea. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BXNNY1700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c09687eaefbcb8801568f08464ddf76207cc71f450d49fe699f672c45741929. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BXNNY1700030.
Idas e Voltas / Se Eu Não Puder Te Esquecer - Acústico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa051c2712b8aa325eab24ee4870ed5f1966589df397a2ba2f67789432ddde10a. 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/QZ5AB1807243.
Vestido de Seda / Copo de Papel - Acústico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60b35e21d904c778d700210660cbf6a4b28626b5d299564d130d977dfa6a172. 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/QZ5AB1807247.
Rei Caipira / Meu Sítio, Meu Paraíso / Desespero do Mar / Ditado Sertanejo - Acústico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c5191f4b52a32f20718f46b66c9a64ef1ea1bc8cff99b69262b2ae093c141c. 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/QZ5AB1807249.
Amor e Saudade / A Mão do Tempo / Oi Paixão - Acústico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081dc4914bb8d9f2229e04b866e670d15190eaecba5928cb9e18a75d0ee8ab3e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZ5AB1807240.
Aqueles Olhos / Não Precisa Perdão - Acústico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402950ce973c7b043c4a3dbb77816c98171d0f2b944e3eebc54b13e86cd4fad3. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZ5AB1807241.
Rodeio Brasileiro / Gosto e Desgosto / Trono da Saudade / Uma Coisa Puxa Outra / Sistema Bruto - Acústico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9d450348a6917d0a353c12388466101137078496022887de0eb8a4e6b492dd. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZ5AB1807246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbff8614ff2271cc63833816145929d3ffe45e6f782b03bb37fdc3da3cde2e5b. 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/QZ5AB1807251.
Rainha do Meu Destino / Seguindo Seus Passos - Acústico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315fffe3148525c99c1dedd4adb4dfa7fda82a0eaa9585842c03ccf6de0455da. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZ5AB1807253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15a1df2ec5560038edb0f070c8fa73049076478357a8fd6514cb03878874f81. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZ5AB1807255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4bd9863913dd2c409b82361d74bb6b2d083964de3b47f80f664ef8e4f1eff1. 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/QZ5AB2224082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e483c3e3b6d732a54bb3ecc4a981cefb7aa4e04b3751920a79cf7867f28da7d. 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/QZHZ62195878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd49cf71c23f87267085f4d1023b594185f7709cd50b782131460dd2e045b2f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US7VG1820730.