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 0x51d6890579de7ce462d87b35be514b9ebfb2bc0dcccb60fd212963096f01534d. 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/493dbd95-b23f-4488-a86a-8828ff74ea28.json and https://artists.proofprofile.net/proofs/artist/493dbd95-b23f-4488-a86a-8828ff74ea28.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 0x4597672e6adf4ebc8512e9eac428b4d23247a4a6aeb1302fc2382efb6df8be20. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZGWX2166005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986356d285df0ac3b502f79a5b55fab0744ce810f5e69bc8f680aee0411c5492. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAFX2175832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cf40964469d4500e47f709900c61d27232fab9cb5322eab8eab8bf098f06ac. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRS182147481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbde0061c7ddc448c99aaba8c23c209c9a97b3e93fc2ac72bca9bb5b215e8d0. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/GX5MX2275521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47298f3ac4f7801148a8fbd72fa9cff8eb29844c28776e084e755b033634656. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRX452360740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4ebb95f424dfee4ff312c6c5b9cb8b8f0f627db32be12ae39227fecfb9d873. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/FR10S2418412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cb9c8139075bb0d48225b9c160eb63acf8a7d407550f08da854df10176a3dc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR2X42453714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e74780537e4045ddcef0374f1e03c2921721b2c13df4a93599ba2ebb12386fa. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ROUM72400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e74780537e4045ddcef0374f1e03c2921721b2c13df4a93599ba2ebb12386fa. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ROUM72400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06249fb744db24022d91ad9a0d9692d798500b5333e9299ef2c72ac5b9d3775e. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/DGA0R2404609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2bb076515141eb263382bebf31bdaa47328c066a411ada5a3529e231ded3c2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA0R2443845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f108557d922c12705eb8ddcd6bd24c5a093e05d797d81d7a879bea5092e4e6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ROROT2405672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a6b498a25ff447f22807dd696c14cf769b963e9b31a9a7111e10135714198a. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/FR96X2569693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d3c2ccd860d75533287cbf951e8e35c98bcf92d7bab0c36939e9e86d6b6cd5. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/DGA062563908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a6dea5eaf8a8a65d927546fc94dc2216782e66f75156c66633e80a8c0d0dc1. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/DETO41961932.