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 0xb90055d2d397fedb71659707bda50ea4b56b16162467162da8eb352413833167. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c425efb0-c5e4-4cad-9988-5b8dd687c5ad.json and https://artists.proofprofile.net/proofs/artist/c425efb0-c5e4-4cad-9988-5b8dd687c5ad.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 0x37974511590a44585c39849c21fec058e85cbf8cae55ce1adc9b9e671e62c9cd. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:09:45Z), 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/QZMHL2538669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa177a02cb0146f5f95668102d5d963e835679f0d703181004314f76b2682032b. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:38:25Z), 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/QZMHM2522040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafa2fe11f17cf665a9bfe8f0323f2fd55ec68033154d9deb3394ad29c6b5954. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:11:07Z), 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/QM42K2586628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafc5a606c7f95de92058d6f706f5507d438fce26b1487940dd40c2e14225d1c. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZS642509510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b82772706f30ee3796cdde16364e6b1a6764edd969340cfd2a9efce80c90ea. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZMHP2599414.