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 0xe8423b4075f12200976c5172f2bca7d810f422337064e1bf6118f68f6aece69f. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0a3a609-a709-421e-bee5-5fb56c41a035.json and https://artists.proofprofile.net/proofs/artist/a0a3a609-a709-421e-bee5-5fb56c41a035.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 0x58e84956d2e96fdf8c644b7861b1ae221ab5a0b5fc21d53368bd43f44ff035f0. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR59R2292037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc922a3980af2085164ee290e02da7c8243b4f552c436af81449a7a9f06c172e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FR59R2292038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc2141f559c76934ccbd1afe3ef7388defe0c52e0e95b6ac8b1fd1a75b2a47e. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:09:28Z), 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/FR59R2292040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a280728b85104343f3007f62fb96b52b91aaaab4f662e1ff765941f8a64214. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR59R2292041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36d5d6004e9f319b442763fc6927d629d2da28e995ff921daabed3ec57c6151. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:00:44Z), 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/FR96X2415049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c0a86d63018bd921275fda350ef6c497f004eec7efe21a56c80a0c6c029b63. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DGA0M2489803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e3e14d28edcc33affe69f12de0e9c3e965135ce609c64e1d6a4d5d79563bbe. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FRX202547194.