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 0x1d67bf29faf36b76c174bc10e275a64a7cefb66b6dc48df78a49399f2865c652. 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/d32817bd-f423-4907-98a4-777b370ff7fa.json and https://artists.proofprofile.net/proofs/artist/d32817bd-f423-4907-98a4-777b370ff7fa.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 0xb628e440229254a93f9f556bb5a6c743e4c65a41c9fa284626675552ebc6b218. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:39:21Z), 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/FR6V81572138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3995a0bfc641261ba89c7fe3817abcddaf77e752d405f3523f517a4dac99b5. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:31:10Z), 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/FR6V81572139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04894571d38926f8bd4e996734f0a19f2438e0c17617122a956a4e6025a4c0be. Chain 2 (Bitcoin): anchored in block 957624 (2026-07-11T23:13:54Z), 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/FR6V81572141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d1e7555f5dac34dbd893d0a76a52c12dc5941e11306606565ef5d5124b9c95. 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/FR6V81572142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd094c8002de134e356fbb7b75c1103afcf45a6ee737c0c93de8e3efe8df36f25. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:07:47Z), 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/FR6V81572148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152cae3556c47bf4c468df150723da0082924c6b2ae526d88823d5890b23e92e. 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/FRX202076437.