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 0xf3ab794945e06d49db20947b6b2cf2d58c81654dbe870b4da38ed24a2734681b. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a59934c-8873-442e-a31f-af39b41133cf.json and https://artists.proofprofile.net/proofs/artist/7a59934c-8873-442e-a31f-af39b41133cf.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 0xf965e70af85070b15a0c76404fda11280db54adcad9595b3b9b0d367fbb19eb1. 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/USCGJ1163050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28cd24cc9f4d4ce2de60c62aa1a33365b6710eba13de315efc800e2acfcde524. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USCGJ1163051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb3dd5ccced27aa73c1c1d84282365536467deced72a74127c7e28cdeb1e71b. 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/USCGJ1163052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7a27a19b9a8f264ebd8018accc613c5d6eb1dd24280a27ebf5252b8385e634. 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/USCGJ1163053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28455ecb9092f4daed5b16165006b49ab41403ee684f2eb778a7c6ce231c43c6. 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/USCGJ1163054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec2825ffb76fdf51b66df964366cc7dc3a82f5378764a4155aa08e5b2300569. 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/USCGJ1163055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca3dc008f366711d4b1956031bf644d21dd8d90904f615d451c86b36e2d5645. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USCGJ1163056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf540d1ee00fc0c0e8e3498621e1730448ab151d0b93f261d6c24ee355383a90. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USCGJ1163057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612ee24fd6ddabf523764fec32424af2c2d9562452f7c0446866271f1a33d9dc. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/USCGJ1163058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d0b0768a55177f600680466c4410c595e8149d086c6f896a17561043ad2cdb. 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/USCGJ1163059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ef91e156e5a250f7fec6684d17519cdecac50f7be5a8c27c3ab6f78bda644c. 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/USCGJ1163060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37423a6b10e81cbb91ec121cc89cca35bb51a8f77607a5ff38ecaab0e364b156. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USCGJ1163061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529b86a0f0a77f883f90f67373b93f26ab02c6d3867077697c45cae3575ba17c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USCGJ1163062.
iArriba Suena Marimba! Currulao Marimba Music from Colombia by Grupo Naidy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861379af2518bf67b7394878df43605f6fcaa8cfa68b98f0877fed33797db555. 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/USSF10651401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c2336fe742853b54fc7023a2556799163b33c7890a82cfdb2492894e019c9c. 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/USSF10651402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f23523fc2748831a20b532d92eb386ae200d5b22de040993d9a19c3cf4b50c. 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/USSF10651403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82aab2900282479f992f1c69e9a893d9065e64bc46ffd91dfa7974909385e45. 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/USSF10651404.
¿Lo que suena, qué será? (That sound, what could it be?)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94a726aff899bf5f28f24fadd7d5f1f8c4e6d5c18a10be28787be22832187c1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USSF10651405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be2c3578d4ccd9da19de110ef7160060d81690ea1c774d57daf0ec095f073cb. 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/USSF10651406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ff5301c9f580b7629b01b8ea522f1890ca13aa3306ef0f6842d48da3643d9d. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USSF10651407.
Lo que me trajo el Niño Dios (What the Christ Child brought me)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391507825ae2d194cb192e3f58cd631234697883e0b84f3123642705cdc1b09e. 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/USSF10651408.
¿A cómo vende la piangua? (How much is the piangua?)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc750d114fe616efe0e21048e0f181aaa9f12519b11cd167d9fb7c26a82213c5c. 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/USSF10651409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855edd83b3724eda5482db27f8e807bf611a7e89c9633d47649bbab5273f7858. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USSF10651410.
Vamos a adorar a Antonio (Let's worship Saint Anthony)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b5fb547c9dfd98acbbb8ddead7473032b0695792297fd1f4ebbc40ad1a8efd. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/USSF10651411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e891b7d43898f2ac1c1024b0ca198e43a8171a08b3894fc48e6c4eb3fddde8. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USSF10651412.