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 0x04bbf8f93f6b44b910f5a3c83c33969ba8d553e86f4180b9799ce74f8d28ffeb. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a561f858-8cda-4b68-bd61-a47c9fac9fc2.json and https://artists.proofprofile.net/proofs/artist/a561f858-8cda-4b68-bd61-a47c9fac9fc2.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 0x88a26e04830f79f5cf1a905cd5cf839fb97b72f83ba69f5ac022ac55c4f13587. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:15:37Z), 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/QZMER2108860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296250bfad97fd74915e4eba2901baa6a87998a98125e1a4b75156778c3fcea0. 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/QZHN92437746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddfbc87e42e925571c1aed0a643e04a7ad821c1a1c32112fc1721b28e77b8a8. 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/QZHN92437747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf2e4b7856d6f885c9a39e187df8e8e9a4b085f6e2343e9de741d9af4acba95. 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/QZHN92437748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5007198e4f08c73456693def03ff25d541a928c0e5b7cdf376bd6345a0d270af. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZHN92437749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16235a48283c8b397987cc7dc1b52f8ddc11eb1654ca7b85646775bc406d262e. 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/QZHN92437752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bc50ec637503ddb520d7ae2d47f721fd8f2ba0700a8a51c7705832c570f6c6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN92437753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6524786b7a892f4075fd4075a1d371c78691e39c9911c5548d8c0b82d160179b. 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/QZHN92437754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459e3155b34dc6c4ed1fbaa4671f05ef57c54351ac0069e6e0e9111df8c46d35. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:14:55Z), 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/QZZ8A2433505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaddd1f97e74d6630a386bc7e1bbbc3058e2eb91cb50c8d4e282090d5a69668f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USLZJ2551170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459e3155b34dc6c4ed1fbaa4671f05ef57c54351ac0069e6e0e9111df8c46d35. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZZ8A2433505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d81dbaef3047b5d1a113076d81b8c2b2155cd45422045eb1af207b919f59336. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/QZZ8A2433514.