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 0xb179280478f53df3f0b753ed760dde9ba85a4bf0579b556c0450b218466dfb96. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cca6f0a1-dfc7-4fb4-a949-9ae27cfd5c0c.json and https://artists.proofprofile.net/proofs/artist/cca6f0a1-dfc7-4fb4-a949-9ae27cfd5c0c.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 0xe17877314b56333e526fcb377d4aff2ef0604f9511443cd6308d171be6a79b16. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCACS1686281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe5227052940541f0d4df00781e71f4e5ee27096677be06c773b0209bba89bd. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:53:03Z), 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/QM24S1703240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02eca40edf78a2f7a9e7d9e77b43340ec3c632a0e243aecb944084aa2bd91d9e. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/TCAEC1924043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630608661b3041a5c41987763601fb2d51bcc12c86b2eb8320fd5c1de08683e1. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZNWQ2126707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6df72d675c5c73dce8efbe99bf978803a0c1de59cefc3c0e05a739ca989c4e0. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:28:12Z), 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/QZWFK2423445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cc735468297c813e90d33d706836e4e83cc5bae63e45cdcc8e48adf6b2877c. 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/QZWFK2423446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb60e7f1a337d38a898122d235e8c705bc1e90e8ee9281a32b410442df7246f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFK2423447.