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 0xf0b646a2f3ab03b17383697175e31081e127ef21cd822e483a0e8184a5ebda99. 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/e5eec6d6-60ef-4f0d-b948-fcf408f3b489.json and https://artists.proofprofile.net/proofs/artist/e5eec6d6-60ef-4f0d-b948-fcf408f3b489.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 0x6407a8d7c89645faa555bf28e3c38ac81433d86e5700fee967906d253ad27550. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GX89G2271047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59fac26054e27d423a0a2402e2a631bd4396679b0ffc18f1885bffcdbc2ce07. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/AEA2L2303189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4853bd23c167d778e44eced527d479c888eae287c36303908a7da3e1aae5068. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:36:30Z), 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/AEA2L2391025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8c4da67d2ce1ea221d7a6501b33357710079d00272b23a507837073fdf02fd. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:03:34Z), 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/DGA0Q2402879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05455ee777ee27a853ad675ea2ec0d8bcb846ac6f2ab9fe77f55b4757228799. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:40:31Z), 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/FR2X42512696.