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 0x2b7f067f93df2f78ef3f1b9bad7c6d9981f31bacec0217950de64bd25196e29c. 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/b1a8e25d-dcb5-4504-bfdf-ab88eec323e2.json and https://artists.proofprofile.net/proofs/artist/b1a8e25d-dcb5-4504-bfdf-ab88eec323e2.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 0x559e620bf5951fd49ae7c923482138d099d9e5b1235ddfb7c0b819362c8b4f89. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:57:28Z), 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/QMEZE1793163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034b1c98c7bbf4be4c265e3ed1839a4bb420c79c43cf9fd1ec72af6bad8752dc. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/GBMA22158305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56901f504d755c566168277c8b3e9b86bd54ad538ae3c35791cfd1a99f47006e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBLFP2210814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474565f5d1d4151b7fd735f3b64adc8d8a08578aeda3beecc53c8f745ad553ca. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:28:45Z), 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/QZFZ42345590.
Continuous Mix Classic Album (Classical)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87ff9ca1710bad584a03f11ef7f300290741e0c50e6a9ef11478f208258c53b. 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/QZWFX2462158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509a85e76a6ae6fe2733d35b20f00624c6327467a71ef6ef1b5d4bc0183ceeb6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFZ32512270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59acb13c3ba55b4c5855f375c8d58c8f57497290884cb230f36dddc45fb086a6. 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/QT3F42401323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71dd34d8d8b54f298dcca8fb12c55c8a4c1609ae861e974fe512e05f96a157e6. 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/QZFZ32590649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48767f06fc6405ed031846fcf2ee9ec625889690739e65367f00159600a976a. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:38:44Z), 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/QZNWX2590616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab472410dc90998f99964a80a782d2978a14edf1b25eb93847f21099c5b7c88d. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/UKACT2520468.