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 0x740efb36930d06da8870db051c0ba99ca157cd866b5a9367a9bf4d7edda971b1. 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/5044a1da-179c-47ca-8554-d6cec9a2d90f.json and https://artists.proofprofile.net/proofs/artist/5044a1da-179c-47ca-8554-d6cec9a2d90f.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 0x9b292dfb268b1572a363e09c12a0fbb2af959d741cfcb85285a20f18adb9c63a. 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/DEPI81600404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282dda7fb9e5b0cf9eaca65ec9bf08a5538d7ee2342a2f7465577e84cbae4fa8. 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/DESD81900258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7960746aa3c4bb466569c0c9880898beab5ca3f9e205f145a01cb24e4389a5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DE1AO2110016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc778144f7742364aede43157ae622f74bca16ccb4fda74373bd3b86366204d9e. 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/TCJPQ2137544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d0ed11446955b10aac73393b90e5a4465b479092981fc07c57040f8cea3954. 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/DE1AO2110028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd642219bc86bdef20802959a22af9db746b75a6009649e9acebf4714f3058d. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:43:13Z), 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/DE1AO2210050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc039539acfaf2d65548129def67889b81ea260285cddeec7c010666000267251. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/DESD82100349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd642219bc86bdef20802959a22af9db746b75a6009649e9acebf4714f3058d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DE1AO2210050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b99dadc96185ecff865a2bdbf68eb20bcfd6f8617dfecb9b15f8308d934006. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/DE1AO2210076.