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 0x84d63bc7852c4bbf1f54c0551a89c18701fa181d775ffeefc942100164271cec. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c53df9fa-df19-41fa-981a-2a6fd6137c90.json and https://artists.proofprofile.net/proofs/artist/c53df9fa-df19-41fa-981a-2a6fd6137c90.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 0xd64b282c1986538403f62c4891f02180207a24e008e51cb88c6c09eb86f1eab2. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/BEFWX1807801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eadac0ed8fd4c1a0d8454d089862826de2156c9b2e0844b8e57df613044b1f7. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:39:46Z), 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/BEFWX1910601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecf5e9804445e123d9cf427ff1ab07742106bbf7395a4316aec438d1ab92dfe. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:03:40Z), 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/BEFWX2113801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe798f25754b2e8001ab4c568d1c8f4235e59136418b28d6088a8d6a2670899fe. 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/BEFWX2114401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dcc1c402f41df7a9dc1da16fd9516be2b1a513f9f5ee4e5063aba77ef42f6d. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/BEFWX2419001.