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 0xdd380f8a413894b3676e9f6dbfed488f71f8a29b4171d7822aae6e7f9b96b1e0. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac01499e-bde0-44ab-ab9d-2de07a5b493f.json and https://artists.proofprofile.net/proofs/artist/ac01499e-bde0-44ab-ab9d-2de07a5b493f.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 0xdef5b664ffae374deafe5544cc7d1b5278ce933fc8701e1c515b929d1442e574. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:37:57Z), 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/QZHN82189290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a784b60a71ecba36e681495c06c0680deae31c4dfaf68af8f0a67aaf8675fd6. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZHN82189301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07bcb84bc0932ade94f552ab69309ecdebcb7fd08f90782320d9ac8e848ddef. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/IL1012301322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e7bb7ff22e532e590b5800c76e92c765f1ffbd99946f8c8f07efb25da6f7da. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/IL1012402564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec54387ba172c30d0ee9e31639ff0523cbea50564d10e49f00815233b307198c. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:42:19Z), 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/IL1012402567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d8987ca6cf67fbf28eaf8bac4e88b236a922e8a3c2e511651758bb40eb4f23. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:26:03Z), 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/IL1012402569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb351916d7aace790f7263deaa3c1e81e484185abc545bcd7a0e2ef25d148bee3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/IL1012402570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30587a1bdaa19f233931629153862278af073032c2651e0435fb01b89b1e87bc. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/IL1012402571.