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 0x968b4ffced0a0f1bc894290379b02262c9227bc232c7d487083b94984fe2b52a. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9433e1a-429f-41aa-81c6-9ed8e306d48a.json and https://artists.proofprofile.net/proofs/artist/f9433e1a-429f-41aa-81c6-9ed8e306d48a.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 0x9f1a5fcae4c23c1b42f3215efda19642df6056302c35de6b05470e9ff625193b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM6P41891567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802f4c70c1a7d504acd34ce1bd79ba0b146772f25472291184a76de326efcae1. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:50:15Z), 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/QM6P41891568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b245b3b45754d66ecd9c16e7e368a6faca91a6d68470e0a70d36a1ff75bcdd. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM6P41891565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02a5e4bd6e6b0040949dd664787016883dbb30cb166e8841c3bdda95bce58db. 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/QM6P41762523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1a7a65d06efa41ae793d6504afe65227cf8e21b2a16755b0c3c159b4b7a5e0. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM6P41762525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc17989a928081ef0ae6cdc72e9bec6b6946ff66eff6bc454794be38a7a0f00. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:24:38Z), 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/QM6P41762660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34102e4bac521897656e29d80fbd632b052609ac887cf1e946742bb095ae1be7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLQ8X1700127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2fe49c89e5dcd16cb1a7b045033cce37d39bd5e4f21df428b4c1b60b9945be. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMFME1387419.