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 0xb76190f675c32f528f7ca78abb470410d9876aaedaea57b87255a014fb880ef1. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ddd14b7c-a346-4f68-aa05-621098d24f1f.json and https://artists.proofprofile.net/proofs/artist/ddd14b7c-a346-4f68-aa05-621098d24f1f.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 0xb6526c2207afe981f8cea6c686c59e0ac545377ea826e651fc1f3e7998a21ead. 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/TCAEW2049187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279559808a5929a7a3e8f44eb527945c7a9daab6857c7254ff46f57d57aa89e3. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCAEX2081669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59d35c1131511e7f3ed64bc27c2afed905747c0627835299309bd8afef7102f. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T22:37:39Z), 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/TCAFI2189011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ad2462a4a6ff5cb91c313346ee4f9727826767644db155564ffc1f1c3c69d0. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCAFI2189026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbb77fbd8c2248d2556fbdf611ff40895b2cb0183129bc2968ea55ba273b66a. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:24:28Z), 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/TCAFL2110984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707cde6a7ecb5df3cba304e623aafaf9af5f846de5053b1ef3fa8b20d6641f5e. 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/TCAHE2336737.
Acquired Taste (Acoustic Home Recording)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf018b0d86757c96e09419d6aa4f0545664734ddc61e9c973aacc067b444a5938. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWDW2509051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bede5b27b2d25b41039933b0405227956a957f710ef7d99a79d579ac07c83af. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWDW2501330.