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 0xc059159a62cc7f077c55c6a21ebfbe6a9c0da507604a1bb1a53ca3e5f0c2677f. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c9020fd-8be4-4c65-b1ee-7517e0d123d4.json and https://artists.proofprofile.net/proofs/artist/7c9020fd-8be4-4c65-b1ee-7517e0d123d4.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 0x985d64e1aae8ad70be015f3dcde89c7468e187881add8fcc31829196660a9147. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:37:23Z), 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/QZK6F2491200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e723e7e34d46cf6801d29b5c084e3e73bc13931066985a9d0b7c220dc8e1d5. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:06:55Z), 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/QZTB82465263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2184ca5dafab2be7899156bd4748cb18a59e87080a93c043e938ee610603758. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ7Q2410589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0687b46f8349e0e61b469ed0a3f0711673e4530700685ceaf9d567a627827a12. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZZ7Q2410591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9a05d8116730d69334f910de62d801e357d18ca6b42cfb5f969430f11ddd4f. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZZ7Q2410595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeca1bf426e2e9db1f149eade29fddf782d963e7d958a01e1674e30144c5a5c7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHNA2532108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189f9e4b4bbe6f7c9d51938c40fc127e98fb2d3f1b27f868687d1a35b43b3cb2. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZNWX2520826.