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 0xbfd7f9dee252e8050a7d04d0b9f4ec0b5d1bfe79ddf85101dba2c7ee324babdd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1c34307-c0cd-4c5d-9fb3-622354746a5a.json and https://artists.proofprofile.net/proofs/artist/d1c34307-c0cd-4c5d-9fb3-622354746a5a.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 0x1ceb358805f10488d742c0a498225e837363ea254f2c4b0bb020c3641a43b065. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZWFG2353694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89aec72e45106502210ced8ecbad8e95056f5d59432b0a303948cd13ada7b4da. 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/QZZ7P2400124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f863d2c7f272903578fed15c6452460620460deae6377a5a727e27a0b744c79. 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/DEZC62571245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0646f925a27ea0f7ed82902f43840af8f968128191e6eeec40f3ef8c28e761. 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/DEZC62571248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4aafc7b355ea9e9ac4a7dd2aa8a9121acf5c71f38ac187aaee3b0a24d1f031. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEZC62571252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1980d77e1d4f7e986e23b7feec61634d35e20273ed8f825bb4dee9d7c3b8aa. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:21:30Z), 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/DEZC62571253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e21410b66f017bf03990e70d99ab577953847a17a48da0865f495a1536d6cf9. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:43:56Z), 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/DEZC62571256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aab6e1e28a8a088cb5f38b3478a07a38231ac2b31f46c03022b49d5a10896a7. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEZC62571262.