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 0xf1c8f1ebd5ae20ed0e89b00d1e6dfc77b874cb4d1a85f971d6078f1d377da183. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42ff2bab-87f3-47f5-a777-37f66269396c.json and https://artists.proofprofile.net/proofs/artist/42ff2bab-87f3-47f5-a777-37f66269396c.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 0x560828f4d303c31e2a965cb05f77c766548fc00a85a532711d201729a6ab7aa2. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:32:07Z), 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/QZNWS2173057.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edf1c62fd24b71c6951ba8c9429c563d908e7bbb8c6c6e47e882636231d5fa3. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:23:22Z), 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/QZNWV2123777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0614d0fe39ad93de674b2e788875886f3f8d8102652849c705bb7d9b2fec06dd. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:06:03Z), 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/QZFZ42271315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e28619a345eda2c8a57daef948b2ee6bd5c83f8d3d29911e393e70656da6dc6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHNB2248900.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28341667d2199c3b4f6f8477653b8de8299fddd9b6802325645170645ed466bc. 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/QZTB72285854.
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