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 0xa3607910fded3a3f3d32db2dc5f153636dbc5691774da723348dd97506e1027e. 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/9b9fde7e-cf92-41d1-89c7-c8382150a4b6.json and https://artists.proofprofile.net/proofs/artist/9b9fde7e-cf92-41d1-89c7-c8382150a4b6.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 0x02384bd1363643e228dfa1bd719ce302518a62a904fe38914e5f2bd9ad7c1eaf. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/INR211200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f5c2119b8f393d672ec98ab79e8c9a705baf10463314e2679fffcb4b92db9a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/INR211200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd0b4f269f7db16005347267a0011cc159f880bdd1c1882e32936179cd10b1d. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/INR211200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a74b8ef90cb0763280271c7349d5f6ae90ef7b20601d1c19e7a43a2d3bc734. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/INR211200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2764557f149678de77b23cdb28e1d17e4c650caa3d2da5e94ab065b1bf33de. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/INR211200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccce073de141c8e891f1247e87babae51f834e64cb75ce452897e5fcc2d6ae2. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/FRX281984803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5c36fc31abd95606cdf4606bbe69d99e602694b4a1957b3bf7c9f0303160cd. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/INF052100076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeccf4f93ed2cea8d059069dae43fb3f017e93b2769b681742b53cb78f48fb2cd. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/INF052100077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152a311a5307682d3aca7c06bc5b7e9d7de75a0bedeea3c98dffaa6048ad43ec. 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/INF052100078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cd2c5b52bf10f75613d528779b544e8fb32ce2b9f90acb633458b9ab2ec9b1. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/INF052100081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3804a2adec0fdf3ccdb164893c2e09b50a56a7c8c872266382b3383d75fd14a0. 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/INF051700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25508318eeb13622df374fb0ebd117cdc691c928fb69b20aac1a0204d4bb9118. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/INF051700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e22e442fddcc1b8b6538569fd2106df64120fecdaf901f4b72fe7291506a29. 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/INF051900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc0cfc5ffa729ede011eda222839f3896f39c00e44d583556f97495ab819391. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/INF051900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7edea6ffcf2cec5137f564aa60c870a95ca46ef5ed3556cc185597f78a8cf0f. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/INF051900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f331c3502423eb53312da3f9b23f63b553b378bb09a77abbcea322912c17c0d. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/INF051900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a4d54912fe0cdcd879977e6916046c704ed53d3d0e978e94047adf3b09566a. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/INF051900105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d950f1a2f02d728d06934a8031ae28bc7e250ffc7c13b3f57acaf4ba904e1c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GXHAF2585618.