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 0xb8a11e24d102d8ec453c7b2ae0fc18a1b3e44f111102d0cd1ccf2a39b9d88633. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/146a9426-98e2-401a-9ee9-7225d6e9a02b.json and https://artists.proofprofile.net/proofs/artist/146a9426-98e2-401a-9ee9-7225d6e9a02b.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 0x46cc35268b9da1cc585c1e194d9e9a491a782a1a148cd26cd37345c887cb6557. 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/QZFZ72479764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa94cd40b4726ff46dacc0b54b775505497bc58fa95598bc51010cdaa5cae86. 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/QZDA52400383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc39e401daf8b2fb758a034ba0112e414a19d24da385cd20d05d36e903515f9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZDA52400387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e37182022c9756e3699bf3a313980fa3366501a449777a7fc2cef43afbb54e5. 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/QZDA52400388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba88dd473ab954174cb11d1aa03692f0cf500c295521ee22b70c2f1d8607b0b8. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZTBF2345889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4184f6cca777fe93adf278479b6eee838f69c3787c36f9a3b5f68080ca7c370. 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/QZK6G2327617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5884b2dd88f395c1eac8578c6e08519980f5efbd25933c7fda777854195144ad. 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/QZNWV2113363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ad53eda75e8d25e73b8940e9562eed80ebe53414501d9621a80f6101ee1517. 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/QZRP42149955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7d586d54e00d4a9bf7d36132ecad5b2edd2329392ae3ad429222d4bdc6a6d9. 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/QZRP42149956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c29cc9df23ae56c4c5a7cce7091d9f7925529c6cd3c4cfde9d1dac86bad029. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZPLR2183840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a6fb196f66ff49554372746e350f8e3c89f1789a17153d86a083106ad5175e. 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/QZRP42149958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cb32630f4e2868ac6d4a742ad50f81eaae7f8d91bb031cb4edf1d8c907d3f0. 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/QZMEP2160637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e67ee67071464f93f6143c8fe2db5b810c488721227171fa72392019b05c09. 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/QZRP42149959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1174fcce7fea05dcfaf6d637cc42c85f251f7dd052a491ee74dbc3fca93d760. 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/QZNWR2177170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0519e82ae60878e8bb5885caa8a5096dc5fe843d3512e1dfea668acad8e76ca5. 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/QZRP52137487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c29cc9df23ae56c4c5a7cce7091d9f7925529c6cd3c4cfde9d1dac86bad029. 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/QZPLR2183840.