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 0x0588c1ddd15e98f0bdc77c01b161c9b50f054e5d5bf46f160301766790936130. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8f7410d-01c2-40c6-9559-aba91506c31f.json and https://artists.proofprofile.net/proofs/artist/d8f7410d-01c2-40c6-9559-aba91506c31f.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 0x43da7b0e470230fe1103890e8473dd709abffdd510cfa5cd76ce74161528b252. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:59:26Z), 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/BXFZK1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd7e59dbca1ec7fb5fef7b449af933b41461507bacd246be5b571c6fd0b2c2d. 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/BXFZK1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf9999007cff792e9fae55ee4770b7500f7a83ecda824b09e518ede14c99d85. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:52:44Z), 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/BXFZK1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccf8ac3df59b46a6298f53e73980ed97f7012eb06d117afd644ac755ec991ce. 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/BXFZK1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f494c46b966a481685edfc94b3632663bf12a93ae188954a6846d4f6fb300c9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USCGJ2260766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7657fcb3be16a0c903a97b796d1c6b2feb4982fd42dcf932e3ce662689bf328. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:45:15Z), 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/USDY42247668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86c532ba59222b8539e8a5e386d4495367541670af5a35a896d07f5fd31ed50. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USHM22213168.