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 0xe96931748a8b153d3cc3dee3cc84d56c7fe8fa27e584dd20d2df9a7dfa1b6992. 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/a687678c-56f2-444f-881d-50ab597feaa0.json and https://artists.proofprofile.net/proofs/artist/a687678c-56f2-444f-881d-50ab597feaa0.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 0x35adffbbb3e82f1b37a327a2cdde897453787de80d851b84900a7ba5b35b6eb0. 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/QZMEP2386567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae33b962b6bacff76406c799eadd31c49c6bca0c4274b36f9b259848fbc6d33. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZTBE2371713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53e2ef461c649258be9414c36eb459281569f72b2e0ec3f1761bb0bd3ec9553. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:11:48Z), 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/QZWFH2319790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65aadc915db4e11249d9206bdca8e1c8e6488e41fd82323153d009fdc84a20c. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:40:11Z), 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/QZK6F2415646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38379776c60ba19be9997ffd58a3a362241fd8553a5464e96473c646b4e11af7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTBB2353938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e295bcbe573efd3bb1536797f8570d93163d049160b0f00cb05e6daca2c3ba7. 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/QZMER2418699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b6f38d7e1d5d350a41d7c344faa219a7ad0f8d01666f315ffde9cc067cfd7b. 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/QZMER2418701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5a0f05b6d0c4537cd3e04f36ac92f9ab308d0036998279c85dc41a86e1f08c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMER2418702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35adffbbb3e82f1b37a327a2cdde897453787de80d851b84900a7ba5b35b6eb0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZMEP2386567.