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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545ef70de7b1cfa4236eae58382bc89659ce1cfc57e944d0acf40c8a84bd1b19. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/765ddf84-941c-48aa-b619-87ce93f52606.json and https://artists.proofprofile.net/proofs/artist/765ddf84-941c-48aa-b619-87ce93f52606.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37e6404d8d860beb2612980d0591c519ef4cd6434f4b4a44f5e22fae016d511. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZANY1700128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5252d5daa9d21d575b3e162c98d8964c2dfcb608c5ad52e5f3d49d0fd0fe2af7. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZANY1700139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5252930c214c8aee0d5eb17b0f57208fe78f2f0c3e087050ea7a5411a32204. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QZANY1700192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51b34d06275a59c7e47675da1096300982f9eaa79a6cfcdeb19071332f542b4. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZANY1700266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d97a6c9cf020c6e2737f666db1d9f0933756db6898cff4c2b27207698e28171. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZANY1700235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd87804b2c3a0a13ca846acebbb336f756018187b82c0b4cb0567d5b97cb458. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZANY1700236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e6976d1ffd82e95321b406a7dffe11263891c0b29c1d50edf976a3b99726ba. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZANY1700237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcb64ee65d56dce85a27130f22db0118bc9a73624d330011e079a399da9aa7f. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZANY1700238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9133fed284cf19c2511959e5112e396c5dc5c651340a063296438b47b87e1248. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZANY1700239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a0ca6a2f5833d3a32d8e5425835d2ca51ee6814e0b5ef8c4df8a4b234a0d0c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZANY1700240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ded64ebc2edf87bdd6f7383d95d5f110c274e79fe33455b9515f6d5fd18515. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZANY1700241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284abf870e7b6dd162247e88f3053ae8257994bff288b0bf353266f0b6021294. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZANY1700243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea3ba991a4ff84162a366520c31f01993d1682a9c9bc6cc5dd07ff3ce9ed828. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZANY1700246.