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 0xee3163ee497674c4b6a7d11382b8b1abc1037fbbeed566bc6c8c02eb386da8f7. 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/8822b0ca-bb00-452c-bc8e-b5c9a5326e7b.json and https://artists.proofprofile.net/proofs/artist/8822b0ca-bb00-452c-bc8e-b5c9a5326e7b.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 0xff17a12132d5c4061bfb38523b6ff3ae1bb40a3a86acb2dc12b277eda8a0e666. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHN82147522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ae57540f3423bf311e43ffd847324d0edd8668e6016c896c1a5a173771eaf3. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:10:30Z), 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/QZTAW2214396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4928c020bfb6dcac26862a9ef10d7e1f6de261710b9d2fa384fc04feb9de0d5. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZK6P2265860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b96976ea27b6b376c96e0d7a96800251148ca9d42ded1b94cbac2fe7de56651. 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/QZSYP2457202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab1bddb3b55dee28581d3e4f8eb027a3d002959462cd1f2c7eea4ebbd831ef5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CAHQJ2573247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7896144391a2c8447d5fcf3246fa2f04d5268fbd405de7128a1fff17329e52e0. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:28:10Z), 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/QT4K42588549.