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 0x00f1355094f9e5d5491d6d15aaead895b98aac88c611ecbe077453656822245a. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/48239614-0117-4142-ace3-fe91e2c8fdd9.json and https://artists.proofprofile.net/proofs/artist/48239614-0117-4142-ace3-fe91e2c8fdd9.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 0xb8478732a18c7142e695ae391afda43c9e60b475dc0c89b3efab3720076fbdd3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAIU2476125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae9319cec3f7cbfd82172b48e1c174bc58922c6071455692f7cbd97a13257bd. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:19:40Z), 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/TCAIU2476134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3954498b9adb37f8407857bc86ca640d086a0bc1b24bc5539a0b7736c6459a41. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:35:05Z), 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/TCAIU2476145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14716f9cfaf9f803cae515034afcef7ef96b90052a6f3eb78e6a8cb8f6e7044a. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/TCAIU2476157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c5139b61f2ccf96aba4fbc46a6e0bf0c611482c387990dce468061893e6c69. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:34:56Z), 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/TCAIU2476162.