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 0xddc6bc207a46147630b606a1a964b7584a7a457444b739725aaa17e4c9441a5a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e84b283d-9faa-4adb-969e-8540d473cf33.json and https://artists.proofprofile.net/proofs/artist/e84b283d-9faa-4adb-969e-8540d473cf33.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 0x1655c21d275cfbb71f3a3126d9a536a075feea44dda93af179d604d0dc6f1669. 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/QM4TW2397334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e739d085d0427b51a52ede481fa27157022ffc1baae3b22f91dfaec6adfc31f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QM4TW2397366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17aa7385fc8514328fdf0b8d15e93e6ef711dc82608372b823016641f20ab4e0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4TX2329035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e5483849f243687fb997b89d2520a310bc6445d1b6337467600f6b612433d6. 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/QM4TX2411117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a24fa1a278aa51167af4431469d8420834cd7c08790de8666b08a5094452be. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QMDA62409672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28042a5d5818d2d38fde26da85e6b81b6588de7c9bdd8315db66d55b9ac54f23. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QMDA72407110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064da42c634bff22e35708c85d8c7110dec0adbcdd690640367a736fdd687b3c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM6N22597105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064da42c634bff22e35708c85d8c7110dec0adbcdd690640367a736fdd687b3c. 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/QM6N22597105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a33107c078053c6dba737652a12d708e11c07a6ac97dc02bb900c28dfa95970. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QM7282411471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a24fa1a278aa51167af4431469d8420834cd7c08790de8666b08a5094452be. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:41:21Z), 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/QMDA62409672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46de8df70724e5ed2a8f47175944af28ceb712b3143d5530eb38c63497b88281. 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/QM6P42500951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d951774d0b9aef10af2168a1738e8cd5c8a5c0aac61da85a9036ccd12ec69a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM7282578699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69a9e491bc4fcf588567e90766981b7a664f9404f5465dc99152ac9713938b2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMBZ92510696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7ac15fd6e5bf9387ddfb3a9b884001be8555f41cef457675502ced56b93b49. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZNJZ2565283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4adfd3da2271f8eda0bb7a11658da6a042b8281c5e4b5aa88f9165458319d868. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:49:51Z), 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/QZTPX2537021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5551609dad268e28b205cdf4bc120eb2d93fc400ceb83e55a45bbf1d121d478a. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QMFMF2557901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b863cbbeca160f8b0173e1492ed4cf63aa00bd2a73ee412d9900662900bd82e. 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/FR10S2429961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a33107c078053c6dba737652a12d708e11c07a6ac97dc02bb900c28dfa95970. 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/QM7282411471.