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 0x63c9d02ddf7f852c01b5aa5100fd5236fb2771577002d44a9f9f8bb4f524c3ef. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97a65f74-e78c-40a0-86ac-8b1f12948e59.json and https://artists.proofprofile.net/proofs/artist/97a65f74-e78c-40a0-86ac-8b1f12948e59.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 0x9bbd82154b7e5e78be5133b8fcbebe8a7a15db9945f7c0c7e8183bdc9305dda5. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:34:40Z), 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/QZWFF2517942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4837f36f46bda051e2893db91d43117174e31c2ecdf8337ffcb9fb60f9a5d12. 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/QZWFR2563237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe584344d00a38ba126559871992518577d35801c36408ca016c917a7a5a1566a. 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/QZZ7P2558358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc90c41a03dd0f73cff97b8a7d93cd83bf7dd7903297321034453082f80cd8d. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZZ7S2546961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e18af147befd8112e41c2937561163a1c9470906165552864cf9ba3dc62a209. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QT3F62575669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b8d003e4e4d246a0ed2f28553a6ebba33221a9c3d83f3241f7f07212ba68d6. 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/QT3F62575670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4350a6654c124f0219aaf8db569bb322d11c12027cf3b73ab95b8206af0865. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QT3F62575671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98377479fe32739cca9f3993e2e77e68ae93aaa5f48438a020c6f59c2bc9c4e8. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F62575672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0d52ebcd22c3b1e3ddb8a143f3deae5ad793195b7fac0eae5d8cf39ec98152. 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/QT6ET2525227.