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 0x87e6d32f461368f409eaf1eefb6c713987d698182ee198663875c2465cb32723. 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/8fca77da-1f6a-4db7-99a0-509c1f6ce017.json and https://artists.proofprofile.net/proofs/artist/8fca77da-1f6a-4db7-99a0-509c1f6ce017.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 0xfdc6b5a282db73f874e7f76c52b44315018e09b490aa6ab7e3ce80145a547afe. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/JPW462402429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23641242f8f0f64e7862731e49096e2d19643b6338300e4a8a5fc78041edffb7. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T11:37:55Z), 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/JPW462402428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7c436e4f67d4de7f7ee434bc4ce27de9612e803a6aa0a8e929d2f67f11018b. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:58:00Z), 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/JPW462403020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5325b594f5db4b0aba0d8d1634eca0afe946ca835e218581d6c3cbb0c917be. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:42:03Z), 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/JPW462407816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de255b40f7f330518504e8998f29891df0824f78eabfad057bf0c641b979e0b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:36:02Z), 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/JPW462419254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4792d6b85e8d9ec64801823fca02e992160dd87961a6feda6e188fe24d3126a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/JPW462432921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d43b592e6a3d8613f40ecddb1d8af183290f252b56873a9e47688a6972740cd. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/JPW462462129.
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