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 0x630b4d994d08dc1f34b6ca60929c3b768415e8edb178117b80d27ad9094de664. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5081ac5-b6fe-4bfd-a369-95afeb35d005.json and https://artists.proofprofile.net/proofs/artist/d5081ac5-b6fe-4bfd-a369-95afeb35d005.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 0x0dfed154b0bd07529ec649ac08c6847eb8041694ea216c966172dacf8d5c2a85. 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/QZFYX2549444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6765450834ffce70e70460c0195980b78eb69ca5de358a0d0b538b80e96d387d. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:06:30Z), 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/QZFZ62194185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ed722275a0e5c5e38e0ab8bc4f77c172269d8dc3836abdc44acbed5b4cd0d2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ZA41S2101919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0f3220a147127455cde5e022f7deb4b477fa294e7a068fb804f242158a864e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTAW2222209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b34b26c87bf3ecca14f9f25f18f6bb7e3f10e3a106e93eb90b76d2be1da664. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZHN32303655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486c4d20da30a1d247c8551ad5e1e60eafbf7223db8ea5d5b6c9c71f6ca4d212. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:53:06Z), 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/QZRP42423323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf30cfa51cfdc68b6f5223fc65d3cbf8b983a8da816031f18954f150991c1479. Chain 2 (Bitcoin): anchored in block 957527 (2026-07-11T06:08:55Z), 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/QZWFT2420052.