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 0x73a5af4bf293587db05adc076831f91d40e3a7c9e44d5a8e11ed4e8affc570ca. 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/9e357768-58e4-4811-997d-bf08ff1d6443.json and https://artists.proofprofile.net/proofs/artist/9e357768-58e4-4811-997d-bf08ff1d6443.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 0xba97b1f6d2d736b992d62f8cfb3c97b109baba125a70a21e68c93a24f78ef589. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QMLNB1400242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f140b60f182835698877c5dbb53ee703ffcef5adaab707f5f99c9b28a162c5c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:06:49Z), 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/QMLNB1400244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06259700dfb59566b20e6698f6638d0464d7d29d4a4df48a4a3f6b664ec7762f. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:27:42Z), 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/QMLNB1500663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f6e6c3ab2eb4e242e2e54f5a121c122e4cb909882706bf570caab5bf64b546. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:42:59Z), 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/QMLNB1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2816a3e63fbcc44d52cc83f8e89a36c0f187007bacd1a1189f62ecb62ba4503d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:41:31Z), 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/QMLNB1800380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3acc888c3f447228bd0b3fe35abcf007992103f99aa245f62ab44a816b20f363. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMLNB1900057.