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 0x85548e839484e8fd2252553ac1c7cc912bb27b0b641a7c43ff86ad194cc4dcad. 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/25ca5949-14f0-42cf-b9ab-f89b71e5a07c.json and https://artists.proofprofile.net/proofs/artist/25ca5949-14f0-42cf-b9ab-f89b71e5a07c.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 0x6db5237c002e5902d52fdf21bb12e7824f19cf00ab281ad459b844537eaf5025. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ZAB040200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f832cac93709c35b011309665350c900342e8349013072d1888675dc192d17f. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:22:50Z), 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/ZAB040400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa691540dc7aebb0c7387a78adeaa8335c55d45c41eba417ace1ff3c5b9a4e4aa. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:38:26Z), 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/ZAB042500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fd676ec60323d43b4ec3afad1055d17466f1ba78ceafeed74156f506c0ba48. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:10:16Z), 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/ZAB042500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad307c6a9ef681f2cfd569aa2212f5cdd288adee1112d606661f96f43ac003c8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ZAQR41803335.