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 0x4381ca445f8dbeb6c80054a9b0ed3bb004a352d395480a1e8adbc64db93f052e. 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/dfd11332-29c3-4053-b190-866189d53fcc.json and https://artists.proofprofile.net/proofs/artist/dfd11332-29c3-4053-b190-866189d53fcc.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 0xb60f226311eb015fada48bb8cbbb8f5f4ddc4829e55785675c209cfd3a4f4d9a. 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/BXTB12300286.
Com Outra na Bodona (Estúdio Fazendinha)
Com Outra na Bodona - Estúdio Fazendinha
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9465dc2964a9ab3868f870b8c97a21d23c46e2200349b8da93dcb0a7f6984f8f. 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/BRWMB2301768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09281dc911493bb27118c796461211be521edfab7a52d636d688e0b3dd909c6b. 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/BCA6L2300013.
Atire o Primeiro Chapéu (feat. Dreysson Rodrigues)
Fazendinha Sessions - Vai Ser Bão Pra Lá EP
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b537696fd699887730f19d76ab420f2d0c181504bd235b3e499722788326623. 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/BCAPT2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad3b64807db86a0a5b9b7422db428e78b56edc4e3fc45c4fa7266ef06db9038. 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/BRWMB2201253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda15bd66a2b5600e84bfe2eb31dcdb30201a97178c683c0569b0d47d0e5157d3. 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/BRKO12200160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09281dc911493bb27118c796461211be521edfab7a52d636d688e0b3dd909c6b. 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/BCA6L2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036965ceb4caeec03dc99505710be2bda25ee4093fb1b14e81a13d4221d0c562. 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/BCCWF2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1797868b14b7826763d146e5186259ad80782dd0e5422add0afbbee3cb45a69. 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/BXNT62207497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6110ceca2f2969b1c0eda9c994dbff67742449a8d8618c7da896adee548d17. 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/GBMA22411831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3173f7599174388cc0a7cd4b395563f43dc34c7457ecda6ff5533369567b7296. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BXHUN2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89c8ddcd8420b92e22e3beca0db51d01027be5599d4ff6af505cfb05264ac78. 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/BXHUN2200004.
Mina do Interior - Fazendinha Sessions #3 - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828dfae11f1218112c6a741defc0d16a0f90a608be1e60b38b86cc9e0de0e4ae. 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/BKFZH2300004.