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 0xe68641e3ce240c30a3f96ca6dceed819f7f3704f6533a4a49bdcd3b37c182ea9. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65423e5c-e88a-4576-a288-22414d03d09f.json and https://artists.proofprofile.net/proofs/artist/65423e5c-e88a-4576-a288-22414d03d09f.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 0xb3202ecfc2fd7048f3ad26aa509c78163db9515500cb2cb9a3bb646c763f3430. 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/QZK6Q2475218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc23dbd7d2aacb310f0faa4f50fae4878ed0826417e70181332015a7e3060baf. 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/USHM82470389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc576ead24360b3feeda4f32ee380ffe55e01d07ee9d7df78c3f246b8e33a610c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US3DF2467595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc7a143ab544726dc1146ad0ab2e4fb5077336e8a404e96420fdbed07739205. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BK4DA2407533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5131b8e172b7a1085dc5ab81daa93d294237a6ce5638533269f96e9cae4db6e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USCGJ2430619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f898e1749f0c296def5d9ad6e70ae8304e9d8d3eaf30699220a8511767b350e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CA5KR2415024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927e5786a1523fa54275437868f78a3a96bfc8192355ce664c01c2907b31510f. 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/CA5KR2386869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99dc784d6abd9de8adc56d7f0f22e133403f8a1f59aa74600a1932799f7e73ed. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USDY42347040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec2a5a6b83f4f26339e5c71b2df85b7ecfff980d0a6f202a4e2a4aaa73f7526. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USCGH2368679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae484215defbda141575175ba0705839c636cd7bf4d81b99a964788252fb65a. 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/USL4Q2202561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae7b20bd2fa930771b7b1988c1209b71802109b6bf4bf0285cd791ca4a51a52. 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/USHM82279590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2507bfcbc114baef95abda4e7810a97416bfb4989a2509377b7b5a442a1f5863. 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/MX3742100301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc342068c067f2231fc296848e561aec5d1ce1b86d12f8e87c605b356a63f7c. 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/MX3742100302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668e2539a088a9aceb786819506029e35ea78859a87bd269254a2280fcb3aca3. 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/MX3742100303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3202ecfc2fd7048f3ad26aa509c78163db9515500cb2cb9a3bb646c763f3430. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZK6Q2475218.