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 0x29eb4555fc5283aef814dfe0fde7f0cef29e5b37b24400a54c0dcd2db614685e. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/159ee52c-dbe5-4f34-a06d-84c123a3ee05.json and https://artists.proofprofile.net/proofs/artist/159ee52c-dbe5-4f34-a06d-84c123a3ee05.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 0x0c57c505853ce73654a9d39be2d8b841a3141645c2a167f11fd2dd0e249838cd. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZVEM2307604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce0a63a00fce3cf5eb9d201bb2ba5843461045f6c8342a7b7d139a438ff0752. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZVEM2307605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdccd8bede8a53b2231265e9ef0b2b584acf1731f3d978d733e2a81152303cc92. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZVEM2307606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9469b5dfd325db04b9a0b117ba7c3b3b817fb5dee5bebef3b795eaf49b85b6e6. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/QZVEM2307607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d43c58ceb7266705f5548436d6b32e8a51a81c60165f6f12f75ba6b38b50657. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:45:44Z), 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/QZVEM2307610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31808f78748285686dc68b14bf60cb6228f073db434b188bf24cc4f58465ca79. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:24:15Z), 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/QZVEM2307611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa126da291c8830f13559c778434aeb5008d3396fdd08c12530c220d39ec7683b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZVEM2307615.