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 0xc3432695b52e959c0f7eb58739b59479e406a865c09e30e85ba00fbcc2a48490. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe12fad9-3fe3-47b1-8560-502c085033cb.json and https://artists.proofprofile.net/proofs/artist/fe12fad9-3fe3-47b1-8560-502c085033cb.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 0x384c4f3a7562ef1c847798ea9fcddd6b37f4814056a1d916e968f88aa71f0bf5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:06:08Z), 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/QZFYZ2512880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46b217d1e1ce513ff8146646ef781dcc2206f145ce5a8b69a948bbb7faa2593. 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/QZDA42597594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b036d9b072b1279991fdc61af086b8c0d6b81ea1c8a8164d18c95c9f507c3f3. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:29:16Z), 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/QZDA42597595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b8c7a0f5872c953480836ec20f0b30bd8bcf45418e473469bf856e61109f69. 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/QZDA42597596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10552d02e3355a7a74521a8259f258cb3b6854a20498d60176ecb6f67ea5bd05. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:24:22Z), 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/QZDA42597597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025cdaebc3e3ddaad7ebc2022887ce9effb0efbe867530f67cb4acb30ade4a56. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDA42597598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab037e2dc9afa0e80d8fb1f5c1fef0d13c58e885bafbeab9c890251b2a8af841. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZPLR2589853.