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 0xf6e433c2c9f1227ae6b56daea6e5294f0fa7555fff2e5eb4e050d15f41ce6136. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e38a5771-17e4-47c8-9101-05284c0a6b3c.json and https://artists.proofprofile.net/proofs/artist/e38a5771-17e4-47c8-9101-05284c0a6b3c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Arrangements for Guitar by Marco Pereira
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 0x15cf00caa15d3d9a72ee62b1c5a888341eb4be1ad21c57e142d186b8d135da89. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRRGE0800038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882f298e0a76f807bbe6acfd16ab018f11ad20304aa9768e7f2203767d36e5e2. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:21:26Z), 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/BRRGE0800044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271e3a66fd3e80131a8af67b6556cc792c8c2d38ed8e7055e54812bd4194b7c6. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/FR6V81768662.
Tristezas de um Violao / Duas Contas / Gente Humilde
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3206faf30202ad29a4c1f1e1ae5d00d0dc73a6ceaf458436e449682e4087a987. 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/FR6V81768687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2de981674e80e67d0317596b71ad197f5a2402f3755eca1dfb01356d23f5e2. 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/FR6V81768699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7e62b6123c00e3e17cbe5c5b4fe050ae03e09b37c2b43511223cadbd9a8308. 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/US3DF2462233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e64b3d1fcfd90899c3ac7d6a4fff45791adb29bce17e22510d0279eacdfa2dc. 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/BRVLS9400628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e569f8d47411500faad1282f7b1e5ee70a61f7e75ae8fda574d1d86105f1af8. 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/BRVLS9500583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a05c1b838261bdd6756a7fb9783d67a181053984bd5757bc6ae85df6af442e. 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/BRG5D1300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e72c268ca64ee05a241ee090d578c1079cc151de54abed6c34f5dfbde074aa4. 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/BRG5D1300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49afcc465d2698ebd498fc6f1e3f3a0fea7f9a02aa7b90905981164c381e7ff2. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:48:52Z), 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/BRVLS9500590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5423e3b1a665a37292db1fc6467406cd93de7b080fc3d0bfe127a59be08ff97. 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/BRG5D1300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8810ac6b17e9375f5194324975eacba135d6924e69ff341b680dbc288fc22be. 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/BRVLS9400625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4936acd56757a7f08057c686b36677e3faab2a2ff900c90a6c58fc2425aea3. 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/BRVLS9400622.
Welcome To PEDRA BONITA - Instrumental Flights Over Brazil
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9b995c82b4cc938b2178e939bb214c779b9df29e07f6c8ac969029aa5720af. 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/BREMI8100276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbc888b52e36de6d39a48c5462da0dab8f246763ee2969a0c0d1ce02a0530c3. 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/BRMCA6500260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3b2caa27a0375d891cc5b66fa3942658fd7c39b7acfd0e098b61d8de48add4. 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/BRMCA7900266.
Grupo Água: Carlão, Sérgio Mineiro, Marcio Werneck e Dudu Portes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e569f8d47411500faad1282f7b1e5ee70a61f7e75ae8fda574d1d86105f1af8. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/BRVLS9500583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e569f8d47411500faad1282f7b1e5ee70a61f7e75ae8fda574d1d86105f1af8. 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/BRVLS9500583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7473aafdd0ed62233373404a8a6e106d3fd70885684deaca8fd381064790ded. 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/BRDEP0400502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920ae2820d7ad8e0080240b90331a9a32bcb52ff8e07b2a9f2131206e96b91bc. 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/BRDEP0400503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf666464208c0494ed115b213fb6faa22e2b1c5ec3e588bdc85d2d9b61bf1ad. 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/BRDEP0400504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797f8a6f3d9cb4682715f5ccb212618dde2045357041b6f587b96d0348406765. 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/BRDEP0400505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc56e96e162b5c96128c59f52151235a72225c3ffbc4685a298f438b320274fd. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:55:34Z), 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/BRDEP0400506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25f4e0d424bdd023c594dbf5ad9d99073e7143276c0fab39b407fa6c0fa9455. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRDEP0400509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c41b5b3765274892756acab878b472646ca19fdfa4327c56dc465d49ae44d93. 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/BRDEP0400510.
Braço Forte De Mãe (Eterno Cordão Umbilical)
Nelson Faria Convida Hélio Delmiro: Um Café Lá em Casa (Ao Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f3e7baed21a540e8f8e4a4b6cb9f476af89c535b7acbea29359efce67f7430. 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/JPBOS0000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda431a00ba20340a033d1acc9efdc5aca98866bc5f2e6317dbbc97d3f387037. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:44:44Z), 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/BRDEP0500247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9094f41852df655765b716a55ede97098687cfd4517bd0863766b199f1e9257d. 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/BRVLS9300528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b672b40257de7fb31e8fac01450eb931dcfbd566ae4b8bdb53c215a1622cdd. 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/BRVLS9300530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084ee0bff1cd6c23e9a96b99958913130cebab1df499ed9a06460e00ae51e743. 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/BRVLS9300531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27ec1401f3122f002685e281123dccc3d427d9f830cd6b02b4280e85aa6147f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRVLS9300532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf391c7380fa90d5c07d26e62d6584252c3b02be7fc35cfe30eee76ec7d21fb. 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/BRVLS9300541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc0ff60bb8e8a00423596ef12c02d4a066166df34a8b9eedddb1c28e0428ce1. 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/BRVLS9700549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec6d88e6ac0920dababff11107fec21d744852c91660dc298c7914757ff5020. 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/BCHXF2500001.