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 0x963421b8bc96b2082465459b24dc9176a72fadb9facd7213e1db2451b4d65ffd. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c84b705-80e1-423d-9399-7e22f2e81f7e.json and https://artists.proofprofile.net/proofs/artist/7c84b705-80e1-423d-9399-7e22f2e81f7e.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 0xc26aafa2e122b768f2520372a56e67c2218ad29ee3e9570ec4bcedbc534b759d. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/USCGJ1805925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9be629c31cacd3b7e849c35c7bd0abcbb18d8a6021c0d14f4bc88865dc58682. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:02:08Z), 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/GB4YF0900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de20a3dd11981162ca62fd6be91db66e147d8fcbdc74329d0709f37c288c5b9. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/USCGH2195237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2970aba4dad67c15df42f5c46a5054e395884f1ad4ecd7c5e37f057731b09488. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/UKBB61500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc132517f48272a96812dbd4bf419cf6a47ee85ecc67fd3656a5a9c9726f3d2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:35:34Z), 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/UKBB61500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3bb3655d568949e4e501cff9e7536e045ae9c1d4e41d1b5b9ced193f56d2214. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:39:08Z), 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/UKBB61500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85706d0411a912d83abca76f4eb8e10420ebb3dbb2d7f775311cfa3b5fd393a2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/UKBB61500012.