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 0xf969d06c649f017e51241a815f566aa896a84a2c22acdcf6ef48ed960adcd258. 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/babf58a4-9545-41fa-ba19-6596d0219111.json and https://artists.proofprofile.net/proofs/artist/babf58a4-9545-41fa-ba19-6596d0219111.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 0x5a8557fea92b50967a0dcc4d24332f71a8b3fa6bfb2bc0f5dd74598c0455cd22. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZGLS2093685.
O Pregador e o Sanfoneiro (Fábio Carneirinho Interpreta Pe. Zezinho SCJ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b45b6e72057040ccffa80396200255ef250748a05e12a0c86fa2007f6a57b6. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZ5AB1872976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5ed2f924cbd4e0fe2ff443afbf4b052a9923b01ce672a9c9e5be0e7980fcc3. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZ5AB1872978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6996a51068deb7718cb78e8cff035859b596a14c94d3d5f9c179692727b88b63. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZ5AB1872984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696da712d54690f8d38bf68cfc76575961d9086f483c2b7cfb4b860d50e1334b. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/BCVC32200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b20d21edd1c502e93f7deaf994d38e38e0aa9dd7bd1c929d59125806688fc0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BCVC32200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312aa47ccb00e0c268b4957480c604231216cd409597807ba8041b43dd2d477c. 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/BCVC32200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a78e91f1ba63bd464ef49447647f839a69973b03554b58344f8194e7d77b6d. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/BCVC32200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b05ee8a162c7a12f2d7b7ff322ef33fd5ad82609b845585e5d2ffb9ab90128. 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/BCVC32200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ca03585825991fb63ca0f89e1c690a2f628e03f9d7cddcc2e40266a043412c. 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/BCVC32200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f7f4d01b953fd58a6124a88e8d311988c43ae6b331894bdd82c450fde22be1. 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/BCVC32200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec44d850b1cb51426644e88d5c4ce7811bd1896abcb804444dacd57df4495c12. 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/BCVC32200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504abaa2d37df64ec2d531780f7a26a3e1ed52b0d5d18faecfbf5d1f74bcb36d. 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/BCVC32200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b1988ab3293d12e7eab51626917b66467a414b5a8fde110b68bad9d7a5e974. 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/BCVC32200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73ce44c23a4a2898655c59f5457fa70732b4b8b92a8c07cb088df4ac7bc2099. 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/BCVC32200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a30bcfdad22f19d163973c94d34d127c8102c14ce9622738a88f1eaaad10744. 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/BCVC32400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9defad889608a5c32e96605ec560c01bf6225800a712af0580a084908be03f0a. 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/BCVC32500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2ccf67a0e4d95d9d0160c27bfaac061ab232bc39344b842e7ac3dca338a16e. 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/BRFT82100246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016f6eb4c8a8d5daf17826be900b455a8e4f6c04c762694ef62138eddb0c2c8e. 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/BKBUH2300141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb046da70359dd54593753b472c5031016557fe0668324aab402d8e19a785d548. 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/BKBUH2300156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13a8fc815c7dc173c14fcfff1ed0fcc5572e45521153294648371cf88a09d55. 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/BCLFL2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36875361d2c56c41a0de623a47affc488a1e5ce63c9dbcfe9b2f574e600392f. 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/BCLFL2400008.