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 0xdb1654587d97cd4f9be566f73623ba170e1cec2a1e544272f554a9efd3a7ad64. 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/f8c2bac5-5a37-49b6-ba18-f3ab8f38a74f.json and https://artists.proofprofile.net/proofs/artist/f8c2bac5-5a37-49b6-ba18-f3ab8f38a74f.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 0x1158d96d4b7f246879ad95713036e53cf988e309b867927d2022187fde1f3f56. 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/QZ5AB2217326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08337b060716397b0859c783573b8d159024a70f5ed8cc6757ad7d849d2c5db. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:50:39Z), 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/QZGLS2216205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466a2f62fd259c9b55f2eb2af971acc5cdee162291c97456612025cee84406fa. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZMER2054797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd196cde3067135806053f1435ff1358dd31929427f623a3b35b992ac43de3faf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHZ32241342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4133a5af35378c00347d9de180ed29720b5467595387b1434582319c4794a31. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:50:19Z), 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/QZNJY2285754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1158d96d4b7f246879ad95713036e53cf988e309b867927d2022187fde1f3f56. 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/QZ5AB2217326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef3ba364186db86bce1e78c90d20a69dfe16e042b105b662600fffb262e801c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNJX2204344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68c273b8791e0b893ceab58df4d1d37d993a84d34914f6a2d058f3f39ad8800. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:36:03Z), 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/QZNJY2285757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f2b796def4226a3188493de647b3d6a65612a18aeba7dc6063f364281649da. 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/QZNJY2358675.