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 0x781d271c3e4c790f1709be267415b5f23f8fbb226b5a0e04b612d32fa84760e7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2f586d9-cb08-4460-a259-eec0505fec84.json and https://artists.proofprofile.net/proofs/artist/a2f586d9-cb08-4460-a259-eec0505fec84.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 0xd6baeeaaa018c5d80fcab664780dfec7475daf0d4492b40e13a655b648a987bb. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:55:22Z), 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/TCACG1519694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8105c0dc8d15a99936429b14bdf448800cf4f377b0463a36e1a348d0c734b61d. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:59:05Z), 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/TCACG1519695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6e177527b628b52c6651bcca3c55a2d30e2c1271f6d3c287e3868d4b9b370f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCACG1519696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e132dd32793d340065ddb01ec570ffb0481ee0656b389108432f16e4916784. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCACJ1548959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c941d8696aad912c4c0fdfe068a12f3e7e52987da097bfe52e08dce06a0158f. 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/QMQ3X1700570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2cfb3b5747beca2a9c01fcaf2083326594b4e19804c69d2d25c60fcde40c85. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMQ3X1700579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b83cbe8f218c485ef97dec33790aaa3340d4effc5d8cec451cf0730a870fce. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMQ3X1700580.