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 0x7e1d38f75136606e8fce311b1918016d74495de7daa57494150fb9bd90d2f5f7. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/baf349fa-20f5-4ac2-b2b7-29c5f9d0fe31.json and https://artists.proofprofile.net/proofs/artist/baf349fa-20f5-4ac2-b2b7-29c5f9d0fe31.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 0x0c5d58d0789d7a83d9bfa5a9f05ef82870f3a33ebe35024844661e17a11c345e. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:35:13Z), 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/QZK6M2333575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4872457910b24c3501b357dff93fbd3d192c5ed2ee6cef1de7ec3ab4b484e50. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZTAZ2333565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d7fef636881bcf641dd4dab23423b0600d9a6b2847f6d5578a04f636ea5c08. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6P2477363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51c89880f54e9f312cfea5b4990950139df38ff1431bd8e207b2e7f3a1be32e. 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/QZHN62471967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdcd86130a74a691d79160006d6ba1e2431cf82a2f0acf0de982b367dedf15d. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZWFT2422361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7c121deecc750ccf15f1e8333f68d51b01225cccb87a17d72c7aa886884fa8. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:50:27Z), 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/QZHN82490902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4872457910b24c3501b357dff93fbd3d192c5ed2ee6cef1de7ec3ab4b484e50. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZTAZ2333565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835de6d727ea1b22e876966867a36c0bbfa060f4ba6880304f66000ab4de9fd2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTAW2347805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592b018996b674ead5569359fce0e68a7927e5d7a9522c2a3081e24603127795. 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/QZTBB2477593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9475404b5159512a75c53a68dc211a19fb791d20ec150a6b18490f6a0fe606d8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN62535698.