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 0x9dbabca00f88935d7b871111dc23185e34c502864a0f5db874bd2fbbc0149f51. 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/fd4bc98c-af27-4924-b091-bb27b858aa79.json and https://artists.proofprofile.net/proofs/artist/fd4bc98c-af27-4924-b091-bb27b858aa79.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 0xa9004df9c4110badaa629b5d51d36796d1538eb3522d7f4d96d2f6492fb8cd3c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/BXIV82495560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5c110b4e16b41bec98736d1deff304b970ae6732f6a9eab43a28d2eb9b1616. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXIV82404462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1506ad49660236b6c85d9cc707187eaa56f62290f30bb2da97732578bd5b431. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZTRX2504456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7995bd6887d845c5ffc7ef7028cf6b73fce68e5072b0a18b99ee05f44b8368cd. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:28:41Z), 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/QZTRX2504460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4df3a6a34ed9a4613ae46a1e2b75889c52e04674f5dff41f07c243cf508f156. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:53:17Z), 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/QZTRX2504466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420802ec2407a18c8863c554df0703cbc3bff70c23af5a5ee454034faa9d5400. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTRX2504473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbd091986e8aacee351e4c689b1d30f750950c34fa93f520aa73fac289299e0. 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/AUMEV2552808.