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 0xb82bf439b2f7306aafd152b4555c1491aa850481a085a832889fdb85717283a1. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de15f4f3-cd21-49a4-8121-0a96cf66665b.json and https://artists.proofprofile.net/proofs/artist/de15f4f3-cd21-49a4-8121-0a96cf66665b.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 0x26429e7ab4f9fa4b2865ce66353d57bbd6b2546daea1dcd5264ed4f9a4873646. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:25:35Z), 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/QZHN72508065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11350916c9483b1472f544b4b907c01835eb062226cb961c6cb00246d18944b2. 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/QZDA72554587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048912d0375cf07019173320db9da1b241bc86324b8d27e477f8f49d10a40960. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:30:29Z), 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/QZES72512801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd442ec7da1c392b4ab0fc2dea1cecc5554b6c61ea50bb74f329eac178c026abc. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:52:31Z), 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/QZHNB2535486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f663211b0d51c32839f4b4ad57f27e1118a64d46e9306073be586d9640237c4. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZWFK2560704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb617142b01699e43ac281597e6454159fbf98e176c4eabbe1be559c2e4f1fa47. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFN2598920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39e2b431255be9e14b558e5e18200bdbabbcbf263fec08504524357f45dc976. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZWFU2506602.