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 0x79c5a96fab996f903f1a3f276c078de3ba8cc500918a38e02ccba25461a8ee8d. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db7cb425-2de7-4ea9-8d25-d97a6ffd97c8.json and https://artists.proofprofile.net/proofs/artist/db7cb425-2de7-4ea9-8d25-d97a6ffd97c8.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 0xa5e2189353bf0d769c848d2702f31dcc87cb87bea67a66f56a84c279f28f5230. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:29:48Z), 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/QZK6J2310904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad1e135b3bf9cfec4f52fdd7689c91c73b0b2f1f8e07094bc58777f6b6b0d32. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZWFL2379966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5fa874712bff6e09d5ffada335f88e3557965ba1a1062eee8077a15a8907cd. 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/USDY42401205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245aac3881c10a2de55bc71e20283b93d7a21efd97b686f03f40b4e659bf14c9. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:06:03Z), 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/QMDA72422163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1742e14b77a5266c2131a60121e07a5d23acc9e97791c24c059179b477dba16c. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:19:55Z), 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/QM6P42571652.