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 0x1d0cd7880764ed2fc59e8a974657dda0822e589e69e12571923b75fa97e95ddd. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dfd3ca32-096f-4373-9290-8e5a998eab01.json and https://artists.proofprofile.net/proofs/artist/dfd3ca32-096f-4373-9290-8e5a998eab01.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 0x4f63674e837cea3671dbff9fb01e4e40cfaa9a7158f4aee12e29f08b867f0d94. 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/BRACT1602675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c25620ea0e9501d2df71839b43bd9c0ddfa025347f1bda406f553b09f7c6a2e. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BRACT1603892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f80d98f9f30a46099b3392e902c3e188debc4c3eacb94811bede35c62e16a6. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/BRACT1601201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebee3cb88123e2da8ff67dbfc23417148bb2ab9608b6e0015659dea4285c077. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/BRACT1601205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c58f918bbf644d03cdab0170ced2a7985a7dc4019f22c91424c686125b6088. 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/BRACT1601206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20ec64432b6b52f19efadcc87d97be5b666f1f245d2602a0744521e0cd884be. 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/BRACT1600733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda47d053db80b0f3c82c4385b636c7dd457861e824f0d19c0d31cf16f2f31b7. 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/BRACT1600734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fc234e91e55e9fd08dfb3e8f8ba367459202d7aaa79a9bb01cab0af44514b3. 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/BRACT1600735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4a724df29e1de9fdf242ba71e03af54004b67a960f640ee0c6efa4acba9fb8. 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/BRACT1600736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4a538eabb9d4711d63c1b82192578f508a98b87503dc795723bd5e8d35c901. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BRACT1600737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65115a175859d8efd180b04e82b66c3b132d9a8d05474aa6142b8a87b1a2e1a5. 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/BRACT1600738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cb5d954513e6b351b63614a82fb21d6e262a1661122de7b37409e964555811. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BRACT1600739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed67e9f94b12615229d9010ec273d4e5ccff9d45db65bb744893d38eb60417b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BRACT1600740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79415b665adffbae87ac6a3ea76853330921e4eabf16e8e45c6e436a2ca1f3f. 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/BRACT1600741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8487afc0b4d7ab1f766cbbb73be294d80248c4c7ae8411fe93e456247b9bb18e. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/BRACT1600742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f1aeef6c324ac3e10378c1bc78b757b25a8c8bdec39b6ad1bae85067b3e2f7. 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/BRACT1600745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b2cc0a45675e902565c1c2ec7d444841dfae4bbd539f6c5d81d8459edef63f. 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/BRACT1600746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae78ab4da4e221299a5b3374b6d5b97275da8662a1ab37d9b5d529d7cf5b5e73. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BRACT1600404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1996ab57423a9230f95384aa396ed2d6e211f4bbd537f577333233e52f61835. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/BRACT1600405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38891a6aa1a475588c6b96191695a69d520112de7bd9935b800848c1cf926080. 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/BRACT1600408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965e217c22fbd809071a9c935ac59ebb0621cd3f00290bf462aa37db7915af17. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/BRACT1600409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789e953dcf5241d9441c279a1daf43d48760c11d07f4fc9a6c917022f64b48f8. 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/BRACT1600412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401e427750a95f05b57ee9224c9306641006044d56fa874f227c5e71b6dbbb4e. 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/BRACT1600414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac1f25cf910351217393f8f5b766d51c28b076c695781165bdd7ad5a2474f63. 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/BRACT1600680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2aca39e196e5d0e96ee8107b3d097de0e0140c7257b60234c8f9a2f59cf2d3. 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/BRACT1600691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685d420dd00553b4e7059882a0ccb6979b66b5b07d4328b0b978e5a20a519422. 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/BRACT1601869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc7d3778cf6496a2f0be91c4ac5641a9940d674ac8aa728d435ce5333136ef1. 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/BRACT1601871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45c9e14cee24f809c45da79607271cefcb67007271669b456257f5075dddc30. 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/BRACT1600730.
Rodeio Nacional Campo Dos Bugres - Caxias do Sul