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 0x4ddd95be0b2055d1b39888bb8912de6229dcad89563c7fda222d96889816f2e6. 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/7dc4e0ec-ae53-4a7b-a333-124f2397436c.json and https://artists.proofprofile.net/proofs/artist/7dc4e0ec-ae53-4a7b-a333-124f2397436c.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 0x4776f7d355b8b3545861c4e339e41967482f40c294a9dd6f0b8807bed6c9613f. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZDA41905367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86040b6b7aeeef0e18b888332a1a5305339f6a41614fc1d148f15a6de16a5d5e. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:53:47Z), 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/QZES91952338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89658967769441a0a8fcc4ced1e260e9e03bf9d1b855735a0ac57de1a9cb74f. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:47:03Z), 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/QZHN51924518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484d27e99dd47b4ad1e26e965ccbf4a3d9ece6474560109de51cb118c7b4068f. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:16:54Z), 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/QZHN82088280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40c549dd4980f3c908b616d996120f3c0d1378fd5003605437c377fcf0624f8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USOPM2501153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b4426dba6e5b599e1875d1609b35b80659cd81c5b38dd07716024f988513a5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QMMEH2500230.