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 0x2702d6182005286204ec478ac5a011cf1709ccfd88935d43c45618360a672356. 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/0c7b4616-49fb-4c92-9654-ff35b17d0a6c.json and https://artists.proofprofile.net/proofs/artist/0c7b4616-49fb-4c92-9654-ff35b17d0a6c.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 0xd23d6c8f9f465adc641ce819c1b8de577ee5ed4dc1d75e634c886bf7c7c9f4e8. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:19:34Z), 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/US22N2316701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b58d04f064cc0e85ad277ec9c7cd45d95ce70f1f1fe18eb5a3483d1b705f12. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/US22N2316704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb042b7b650f178d30f0f46b303c188fa86ced2511585ae7649b6672098bbe0f9. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/US22N2316705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253ceb1de75a01a80687bbdb4ad3d4bd32c1768a9b92996d0e90f50fdfc02755. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:08:56Z), 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/US22N2316707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d2c0e6c345c454583171dd4c7fcfe943ca6d3b5be05abb814e8157c3bd8e8d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US22N2316709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36c3b73b99c05ae88f9fdf9aa5262c66c2debd4432665059ef2a2e9bb75c369. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:42:30Z), 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/US22N2316710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6cf42a6fb90d6bb8b5695155be6c67859438f713c28aaa52f6b98b55773f95. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US22N2317301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc966d4269332d87bdb5069620c21c5fd5e8597ad5e55aa3830f90fa66c1f3e52. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/US22N2317304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6cf42a6fb90d6bb8b5695155be6c67859438f713c28aaa52f6b98b55773f95. 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/US22N2317301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494e78924b1cae677b150babbdb00b2806386a98e5515a648be310cb52958556. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US22N2317302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc470677d0f2577a8f38143d07a75076145716144642ad58254ba289b0dc3ba3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/US22N2317303.