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 0x27ae03e6360149745a755a94d723b8795c4e4a9f6c936c34e1225d29bc5dd576. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d95a5287-3bcd-44ce-8f8d-b94395c5f12f.json and https://artists.proofprofile.net/proofs/artist/d95a5287-3bcd-44ce-8f8d-b94395c5f12f.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 0x52918f64e19fb87c68c5d22a74496ca172a55c263fd379d5232d7e8708e7c5ce. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:20:39Z), 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/QZWFE2421804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d21c70ba737fce966f290cc9a27cc3ac12412bbbe4886e898eba92f3deb5f6. 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/QZHNC2402223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f49c431fc439a084748fd43051d651912a0baaa44fabb0f3a9625241c837e1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHNC2402225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0b361b4ee6534fb785beb6cf576bf058aba523ea361c743bd7607f4718dd77. 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/QZHNC2402227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e26eb92fd74a95889db6e571ea4f312c5e2b39316a989c11d010bfb983791d7. 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/QZHNC2406007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c11107be9dfea5b48d832f6e1a61a506bc033d93dffce1db4ce77da3ad05c4f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6K2418888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2cded83c42a65fd11f9f4cb1a52054850d6154003dcf0eaf74718cd3e127c9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZWFE2457182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9aac42cc28e49d318b60aaf213005389da58a63e5c0af70ff913b756a30d1e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFK2454604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61594aeac34b7137a1e8a6931e9358d3612587c5cc98639fa43250a2765b238c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLB382400423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbb191f5ddecac195e2d49fc4f0589c8f26c0aacc9f565faa3a7f3a91dd73be. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PLB382400155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74e5b20b5e9f818b8f042bcd0c20b4806b141e11d74f0cc19609166457ad125. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLM402407006.