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 0x94ab87e96156b20348341d4da50a07d528cf4da773642d1c4b52c04ed02c4854. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa06d8a5-53c2-4921-b0f8-1b4e4b8bc2dd.json and https://artists.proofprofile.net/proofs/artist/fa06d8a5-53c2-4921-b0f8-1b4e4b8bc2dd.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 0x22453c252967000133157e39a8c6127efcdd7dffba6262ac22999bfca00aa59d. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:53:33Z), 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/QMJYX1756201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4e79605758fe94a5888246e81531bc6ebb0d3b02d82f70da4dd8a730310357. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:07:25Z), 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/QMJYX1756202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57386f10e4eca48cc4895b0f495f03bf2e2f9c781038ba42129bef60c22ad259. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QMJYX1756203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b3816aa8ef8ea4138f037e5f102c32afcb77998c837ae88d5add8e541ecdb7. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:36:21Z), 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/QMJYX1756204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5868497d54e9adc8da1e5b8258abbf0be18697dbcf424b09a60c41822286bd. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:28:00Z), 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/QMJYX1756205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86b0dd1cf117e1313e173e1a307f4755d062de486c8d0f0e4f02e9191d72c86. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QMJYX1756207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b309667594693943fada59576c35fbb7bece5ad193486a13f7f8633be108b2b. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QMJYX1756208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6b61a03b9a7f7a90d14bfeb62fb70ab899e63e45e8c9c9a0cec7c710b6d92f. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:22:01Z), 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/QMJYX1756209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f358919ebca6d9dbd2f55519d7efd1c886577eb95b0aabda4eae6f012920f1. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:51:56Z), 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/QMJYX1756211.