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 0xb623164a3e915c7d9437c5cb7aff99dc175bf8e27c1c664dc08d5b8b01625dfb. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5335c08d-e9c4-4b8a-b096-f91a091f0bdb.json and https://artists.proofprofile.net/proofs/artist/5335c08d-e9c4-4b8a-b096-f91a091f0bdb.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 0xbb248e4c33888e8b45acde07b31c847c4a172a86193e241242b2d9f9cec558f9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:26:08Z), 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/GX3HH2368214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c1146906288c64823e18458dba78acb3f83b45342b3635a887cd15086704ab. 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/QZNWU2437682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e090a73764b449d857720864ed7f435f45057ef09aba0fc291b4ee0102c9560. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNWU2437683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac16df2b32e55d52a37ab91677e768ada43522ec42a57bd1a41c53672942b81. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNWU2437684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc20c04857414c7fbb3f8c8234764d78f42bcc4d04d908f81a8540e5ba53e620. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZNWU2437685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6f5b042389f4f2e29ef49d7f9da759e9065b0ec6b22a778fce39cf58e07e16. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:06:28Z), 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/QZWFE2474771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0b84fe569ece37bc9e85c6881951f8301a50fbf9721d72c9e34c37c1a19e35. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZWFW2403920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb708159fa78b2a7db0e2140e52bb6e86ea1ed7b1ea83346dbf01d9f5fda7896a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMEM2569051.