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 0xa733a1dc8d10b578dbff43afb20a36dc650410c96fb1a06b28318f8d76fb1f92. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/296d1410-e6f5-4389-bfe1-45c185e94cae.json and https://artists.proofprofile.net/proofs/artist/296d1410-e6f5-4389-bfe1-45c185e94cae.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 0xa38af3bdc0e36b42d085d89bcc1a142c8992e12ea73ad0e6c8ebe83ad55e6a41. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:47:35Z), 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/QZWFR2369278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d4cbe78d7efdb00fd7016c45b5e224e3bec39c9420c0dcc2c3223998f7f55f. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZHN92467090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b5adb7299f4ce6b797d92ffd416e2a4d425c8362a3221aca6cce7a5d83f56c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTBD2456122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe401bf23dd01596c3f6869894c2e72bb766a79db6b8fe24b8f1ebb06d5619f0. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:33:36Z), 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/QZZ782452738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f192f490414dbea522765d8854519e440049b3e6820b592aa684328dece8cf3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZDA62502115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fd2cf721b79b2904d6742d5e085896e878df9deb88c7b47c47066ad94da4a7. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZNWW2519485.