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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48116b8d7a01abfb6b2942464e85ecd493bb4101333a520da0127bdd1e04bb1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8cd8470f-4a05-411c-8271-28cce5f87d4f.json and https://artists.proofprofile.net/proofs/artist/8cd8470f-4a05-411c-8271-28cce5f87d4f.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7135d1295aaccad7251b31b27e4bd3ee7b87da57bb5ce70456612dc6f76b7be7. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:55:37Z), 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/QZHNC2066627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7af087ec224f0deec6d6820d0115f89fb82c6bdeba580730add61ff97bb0b7. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:39:35Z), 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/QZMEM2063209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61974ec15b417ba8501447dacd7388cfcb5da4c6a408a4fb3e78dafdd1f484d. 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/QZNWR2250041.
MY LETTER 2 STREET NIGGAZ 2023 (feat. Harry Fraud & DJ Battlecat)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968d9b7b6e59859957108e9534494bae48cb9dc36a431063536ed8df0e649524. 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/QMFME2343274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968d9b7b6e59859957108e9534494bae48cb9dc36a431063536ed8df0e649524. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T17:09:09Z), 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/QMFME2343274.
One Blood, One Cuzz (feat. DJ Battlecat)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6d4e7da49c236aacc97b4e7006e8032be6a4d3b0a7dfea0e6a1a6c93c9b250. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUYG1266870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448228bbd088ea887f714a64cede90c9a547cadf0f1f76cf4739ace625cfe833. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUYG1137815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c40700a8b77da91099f76967030554d0a4b1bbbe44c7e6f32637755c18d83a7. 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/GBKPL2170424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d063dc9d7928af8ef248ff9ce0049d7308eadca2875cca6bbc7675d1c51f2d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA2P2308598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf575d59089940bc8d0a20411eb1432a85d3bf1373468bbde8584ec6d0356d75. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZNWR2250042.
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 0x019700fd20bdb96a32d56ca8d7c6392b890501bdcce4ce1659ef9744a7d91dbe. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/TCAEH1910444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bddfadbd04bde58524abb4cc5e7b91d86a8abce91d9dee571e4ca70f915bb69. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/USASN1505371.