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 0x2ec36ef7942305dd99cc6d985b5fa6d820a61f9f17bd34bd47dff11195f9f014. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ddb7ae7-270a-46c4-9264-2c2ab597ccb7.json and https://artists.proofprofile.net/proofs/artist/2ddb7ae7-270a-46c4-9264-2c2ab597ccb7.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 0xf1df18c13854d0086a35b99bc5bdb31580836fe5c39259717d0866b7ed859f54. 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/CAENV2535094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b621222668298bd7718037bd40f9ff273a468faea8fe4cdfb2677c39208b81. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:38:35Z), 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/CAENV2583045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125ba0fdc0fd440340e3e0b976c0501361082d8ea2810daaa24e9333527426b1. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:08:18Z), 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/CAENV2525703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f422ff867d00e8def391e3798efca60a784d0551e7ad39faf1544376250829. 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/CAGOO2519410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0544f0cc373026095ced91c583acd1b99757c1c6ad2c13668825a5e1ad1b7dd. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/CALVP2511942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd9a800e60f11a02ad80e0de9ef6334b81004e394184b64f3abc0ee330bd252. 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/CALVP2511943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9814ede41171d321abbbf1f13c06b6d2317f8d5ccf9352f132f33a8a0fdc2911. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:27:37Z), 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/CALVP2511944.