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 0x219054a34ef0f40210ea33496b1937b76c3ec46772c09e6b2bae8144fa8d9092. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2b5bda2-842b-4f47-9f99-4fcbe77b63ae.json and https://artists.proofprofile.net/proofs/artist/e2b5bda2-842b-4f47-9f99-4fcbe77b63ae.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 0x5014c9783d5ad23279398b399f9ca0bb4345c9b045c2a9c81e1b430af834c2ea. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:41:12Z), 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/USE831512144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0c2c8300d44ade6eabaa56ea336ae5269c7a2f42a348d31bec5691466848ae. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USE831512154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd77b9f9e4727f49256676282c7fc47025beaf2775c71fb3e9c1073ebfe580fa. 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/USE831512337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434048e411a85645ebc75e3b94feef7280df6837bb736a23e53488e00986b164. 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/USE831512347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a7ad26b8c4ef6dddd2385d094512853344744b5a465b73a15935f747be13da. 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/USE831512820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa842ce68360520c690b27725f66c3c3e95288a51c1a26950cac1177108eadb96. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:51:00Z), 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/USE831512821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dabbbc46b74429394e74e235e6800aa1753ef9883ea2e4de1555d8b7dedf4ec. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDHS1900007.