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 0xf7dd36789a0261544af05b07e42c866e3908699c7d054335f37b6b2a4323a919. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d0ee734-fef8-4092-90c8-7f2670d0fabc.json and https://artists.proofprofile.net/proofs/artist/3d0ee734-fef8-4092-90c8-7f2670d0fabc.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 0x65a76437f8207f90c7d478bb16e9239ba28651c03698cecd38534234992f9475. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USUYG1184066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4068d7f92011fdff29c48bb78f3870ec7a3c8506c0878231136286731a9aae46. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:35:44Z), 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/USUYG1184062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52a97d8c56901afd15c6668a4036857f87cdfadd173caa026030885c9fc7866. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/USUYG1184063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cfde32dd5e2ebe98a43999830014ed2a66e6ff5f4c4f660c8aa2c92b7d7dd4. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USUYG1184069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91baaff6030f38092489e5c2cccb7124a1ed9cc951723c219987be83f6b88f3a. 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/USUYG1184070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d804e2d5cac734b905427de01668a0aba7010ff9724b1a97ea135da9c22e459. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/USUYG1184071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ecca3c787132e917535528e82f23617b43369de772a27bb4f3a89a6b3d16b0. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USUYG1239588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafefdbfaef6a40c0d998fa1da4c2f82d3de5b023bddc1d2197b9484ab3b0d284. 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/QZK6G2042499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3126c1d3338ae3fcc904d122d8da660bf9ce89ecc7fcc61af39eff1830440866. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZK6K2045968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ccf624806b6b35eb9027d3baca847242dbdb3801d76eb11ea9d8923a8ab9ac. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZFZ72288331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504f881a7a3e8a7575f4322a20bab33bb85dafd1e67ea8d1b77ce119c763fb1f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USUYG1474073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ff6b89286034fa5464f95b172533b387073a74053320a7cd34c692db55d439. 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/QZDA81816245.