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 0xf3c6d4279638b6a4c7d20fbbdc0b7e18c8c4678ae21e7f162914e41ee5be000a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9bc9981e-64b2-4a34-9985-27ad9e37fba0.json and https://artists.proofprofile.net/proofs/artist/9bc9981e-64b2-4a34-9985-27ad9e37fba0.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 0x40935b2ee50c7a410ccc0fe3fddc30eeff6d4964f7fa9d2f0d0bb9da57ad3041. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/UKGCZ2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb14e4de8180d7ffe978573f7303b0fa7897c88301273e3c6da0eb97f34363c4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/UKGCZ2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbfbbf5bebb51a5fb317a3e0aade062c08032f7cff035e1baa5ca8a7c012f64. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UKGCZ2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04846ecb808cf8b5a86edd63d2c95c5827de8dc4b7c08b3063bb3360a480d666. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/UKGCZ2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a9983d8986f1f4048f8cdb249a098fbab59123ca86bd5d332991e866d393f3. 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/UKGCZ2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6424528eda083196dbf05e1531d33cd9fb935b389a743231871db9b0735627be. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/UKGCZ2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748af81c9e70030c16613b5d482456b1f069642de06fa8184394ea05fc875493. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/UKGCZ2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748af81c9e70030c16613b5d482456b1f069642de06fa8184394ea05fc875493. 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/UKGCZ2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ace3f25c5e05ca745a5bd82790773bb7fa6ec6ef50510453c37bf16e3c164c. 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/UKGCZ2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f6778d4814b9299aa51931de70460797e00d2692353139ee2a6f0207c5eade. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/UKGCZ2500006.